Malicious PDF — malware analysis report

Static analysis result for SHA-256 12286feb19e5f408…

MALICIOUS

PDF

77.5 KB Created: 2020-12-16 08:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44cbe815a1fca972f0bb9daacde56dcd SHA-1: d3f71897c2324baa2764fdbc202844a50feed88f SHA-256: 12286feb19e5f40800b5c940ca00346ffd8a48089f0ed41f8f2fdf12831d42dc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM and the presence of external URIs strongly suggest a phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=the+san+diego+foundation+common+scholarship+application
    • https://gosasomaf.weebly.com/uploads/1/3/4/3/134370397/8329c186f6c6.pdf
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/sirapoxak_dalubuxulavasat_lekor_mitokugijapofa.pdf
    • https://cdn-cms.f-static.net/uploads/4381735/normal_5f9b271778038.pdf
    • https://cdn-cms.f-static.net/uploads/4484143/normal_5fbdc3b509923.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fcf87e171f6413cf5468a0b/t/5fd04b6dfc93c51d16da5c49/1607486317597/fruit_and_veggies_shop_near_me.pdf
    • https://static1.squarespace.com/static/5fc0052111f6a4198480c96b/t/5fc2b1c5173fb5383bfbcbed/1606595025849/bepakijilur.pdf
    • https://static1.squarespace.com/static/5fc15bd3ff13940aa242d827/t/5fc3754df3de5e49b5d06396/1606645075941/imaginarium_mountain_rock_train_table_instruction_manual.pdf
    • https://uploads.strikinglycdn.com/files/681b5add-817d-4d5d-816b-c6f521e1ab90/2014_chevy_cruze_diesel_problems.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c503485235c86bcb387/1606372434297/74025234011.pdf
    • https://static1.squarespace.com/static/5fc66c5011f6a41984ab7b42/t/5fc87e58ee804a17a1d35c40/1606975066008/xizuvapufofobowifes.pdf
    • https://static1.squarespace.com/static/5fc5d9e660f2895dc109c93a/t/5fca8268a08b9342fa9d55fb/1607107176998/finger_gun_to_head_meme.pdf
    • https://static1.squarespace.com/static/5fc350c32e537a05ef18a0f9/t/5fcbe81abce7087d1aeb4a94/1607198746903/neous_white_shoes.pdf
    • https://static1.squarespace.com/static/5fc12a1c9698b02c7f224c6f/t/5fc38c771972c46e3c0bc0a8/1606651002263/55006601719.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e213.bin
20ecf3450a2b875fbb4e1597be2f6114730b51b338e4756e92eb6388ec01d72f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE213 5400 bytes
font_01_sfnt_off0000f441.bin
009a65e3b8d3465be185c625851ac3f9d0c7c16f91ce1a3d3585ee39c47cc7e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF441 11332 bytes
font_02_sfnt_off00011a4f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4F 4324 bytes

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