Malicious PDF — malware analysis report

Static analysis result for SHA-256 316bd0929fe872f0…

MALICIOUS

PDF

89.8 KB Created: 2021-09-01 05:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 41c059efd45b96899b1f1aea95677f87 SHA-1: aec7b7ece43398db21438d6042b98288b7005603 SHA-256: 316bd0929fe872f076b91bec17fa495fa4074eb9f5d1f96f13397dd7cb226e2a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document may instruct the user to open a password-protected archive, a common tactic to bypass gateway scanning. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://coretry.ru/uplcv?utm_term=newton%27s+law+of+universal+gravitation+definition PDF link annotation
    • http://auto-spec.ca/fck/file/24608069525.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b05d4a284ee---39355609289.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/trkcu1acvv0h6i1g15c0it2n7b/tofovezefabuvodivaxisi.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/88538298851.pdfIn PDF document text
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/liwile.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86003106293.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/lenusubufilovewaburigirap.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/luvaseduse.pdfIn PDF document text
    • http://barnesfamilyconnection.com/clients/f/f3/f37d50667a1bb99e511e26172889fab9/File/17584391775.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/rukaselubuvogedewupota.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/mn8eg76n3vd8u1eg43je6o6kt0/16560121299.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/46861569705.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c654b01a8d---57555545183.pdfIn PDF document text
    • http://talleresjpg.es/img/file/nudizitonabesuxiv.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9532cc2bf---dufovinuz.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/69742653300.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/i13j62uuv006aqtvif6m1p3396/fetelabefawona.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/gikivazamaret.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/videxenigoxozojileruk.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/0db0ab1126f76f439a395d1fcb12efdb/93262178942.pdfIn PDF document text
    • 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_off0000f6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 18936 bytes
SHA-256: b8d48e38239fcc9cd3f734e5ef63e89c564b9ed1480a1735e225d1121ca81180
font_01_sfnt_off00012783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12783 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9A 10792 bytes
SHA-256: 366d6b999344e380da570310aa17fc348841d30189c0c776670072da58938b67

Open this report in the interactive analyzer, or submit your own file for analysis.