Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f72947e2ffca83…

MALICIOUS

PDF

100.0 KB Created: 2021-07-02 02:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aa398d110e231586ea293e14ade6bcf1 SHA-1: 8eff1795d04e603542c6a6ce36e6778152a2f3e5 SHA-256: e0f72947e2ffca831c573604cb2cf76674e592423ff1f8c8c966605ca618f2ff
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document exhibits strong social engineering indicators, specifically a 'remote-support tool lure' and a 'ClickFix' attack pattern, aiming to trick the user into executing commands or installing remote access software. The document's structure and embedded URLs suggest it is part of a phishing campaign designed to gain unauthorized access to user systems. The presence of multiple links to potentially compromised CMS upload directories further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://avenue102.com/uploads/file/dejivosiwarufexoninavo.pdf In PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ffe0a4ea---fifikolavobanogiv.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/89669262326.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/hq15gq0cge3tft5ikrs8lg4ng4/50473433227.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ecf37b3b5---32881096179.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/21fae566809b6a40cb9c5b2520b07195/90344201141.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/b7sb96re41aurjb58h54ohks45/63985193797.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e216ce5a6---42257391497.pdfIn PDF document text
    • https://ecoretras.com/file/wegivuxuwod.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b7894fe61da---29451292990.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/17685525715.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917e16bf82c---16676832334.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4660792f00---mufokofojo.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/daraf.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae4996d0094---23921024119.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b0eb59359---8673689469.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/valunazuzapavobedurige.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/70521631208.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/kubenasinu.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/a184760aea5c4a7ffd941b257f3ae644/97631356640.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/lafk3l7m8hrj44012k3312d4a2/53961862068.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/77287365044.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=remote+access+from+mac+to+windows+10PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12108 18196 bytes
SHA-256: a1a22bf834de57773702e1de8d36dcedc9a780b697e1fd808a98a1ca0edf5eed
font_01_sfnt_off00015128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15128 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001693f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1693F 10896 bytes
SHA-256: ac25368c30e4cd4db6b509a57f899e3d37bf3a3264f2bbcf4a6f004f8d4d403f

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