Malicious PDF — malware analysis report

Static analysis result for SHA-256 2075d21a8923523e…

MALICIOUS

PDF

81.6 KB Created: 2021-04-12 18:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 84ba98be3b514bc211dc42f3fc6f198e SHA-1: 69fa223580a2988fadb479b3add35c0e358d95de SHA-256: 2075d21a8923523e500a402b0b401e165aa3a210ad3e00982129f60538ebf69a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The document body, though heavily obfuscated, appears to be a lure related to 'organizational behavior variables' to drive traffic to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=what+are+organizational+behavior+variables PDF link annotation
    • https://cdn.sqhk.co/jivomawufem/uieihge/bebanedapetixile.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/xegumobamuworigugesebatok.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/guvaxenonuvujiviwusoma.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/ehbFo5X/jabigepaz.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/ejfjbiW/38464367886.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/apFTSnM/37375018784.pdfIn PDF document text
    • http://ehaberdevlet.com/the_chocolate_war_ending_summaryunp20.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/10278095650mbwrp.pdfIn PDF document text
    • https://palarijebatexo.weebly.com/uploads/1/3/4/3/134338538/b36184.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/722ce4d804132f5.pdfIn PDF document text
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/lesopigibatumid.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/756e0d39c.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/8oQFFmN/pentagon_jr_wwe_2k19_entrance.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_daa625ce2dde448e9ccb755a6f30cf55.pdf?index=trueIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_4bbfe00fde2146fb961cda1e5ccd331e.pdf?index=trueIn PDF document text
    • https://704d67de-a0ba-412a-a77d-f8c4cf0d88a3.filesusr.com/ugd/a83d94_feb9498e5310443a8385c6ebfddebf86.pdf?index=trueIn PDF document text
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_d8dc4e64486848c1879549d9b170dddc.pdf?index=trueIn 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://scripts.sil.org/OFLIn 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_off0000ebd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 5208 bytes
SHA-256: e1391b3d355911a063e04b622685f1f3c1604009948982bd6bbceb04d19912ad
font_01_sfnt_off0000fd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9C 10392 bytes
SHA-256: d5f807432fd980dc32b378115b3f58b4d2750bd35074391fe49248d0d9549cee
font_02_sfnt_off0001217d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217D 16300 bytes
SHA-256: c79ba6c002979da3aa6a95681cba325fabd8a223b619d9b001bcc5a659213d88

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