Malicious PDF — malware analysis report

Static analysis result for SHA-256 9328d973c2565b87…

MALICIOUS

PDF

80.3 KB Created: 2021-09-21 17:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b618c0e050fbaa47fe8087b35726adaf SHA-1: 01d0799556b90843d9b83baa26e177c1fe8fc6d5 SHA-256: 9328d973c2565b87d6fd9f2a1ce471cf32ee67a199809dc2a8dccb45f44febdd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick the user into calling a phone number, a common tactic in phishing and tech-support scams. The presence of numerous links to potentially compromised WordPress upload directories suggests a link farm used to distribute malicious content or redirect victims. No scripts were extracted from this sample, but the document structure and heuristics strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ebca865e0---24859944574.pdf In PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16144134d4b39e---20459839417.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109072148302556.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/161368b52b96f5---wezevijigugazanegume.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/73167831790.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/kawuloxukeladaxijiwoza.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210906020849.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613452e9169db---sinuloxaf.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/lesebukukulojeb.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/puwuj.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137fde6e2c98---vojekelatedox.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/fa5736c30613be730ea631288a29bdfd/55467084686.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/11436951999.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/fowetirataridasozekizawi.pdfIn PDF document text
    • http://honmamon-s.com/img_seminar/userfiles/file/lovefogajoroziveje.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/60769844115.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139a2f12ee8d---44441613105.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/47916326611.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/79831612809.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/90868001722.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/kuvadijojuge.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161407fee62052---26749562158.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/podabidovuxijamef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=launch+screen+ios+generatorPDF 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_off0000d602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD602 10520 bytes
SHA-256: 84ade7ab451d686085617b174ea392e3da8503747f5cc2af5c0815c4c03503d9
font_01_sfnt_off0000eded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FF 17516 bytes
SHA-256: 46727ce277369d6b223f2eaed7682d27284516c877eff79a25521ae6b89153a6

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