Malicious PDF — malware analysis report

Static analysis result for SHA-256 c329020a46a96638…

MALICIOUS

PDF

78.1 KB Created: 2021-03-28 05:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6be99e9b4efca21dd5a38d1ad458dd8f SHA-1: 561fef37aeac46be2d69b98ae4cbf8af5afc2ec1 SHA-256: c329020a46a96638c761af357d830defde1b042890e8ed3f6607c7ba78305b54
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=ampeg+scr+di+vs+sansamp PDF link annotation
    • http://blog-uniswap.org/497061494065wpaf.pdfIn PDF document text
    • http://wisopenudaris.22web.org/mage_chronicler_s_guide.pdfIn PDF document text
    • http://wutomomar.22web.org/49099069625.pdfIn PDF document text
    • http://bonifacy.site/bubble_sheet_for_200_mcqsahryv.pdfIn PDF document text
    • http://cardio-active.site/how_to_open_my_own_retail_storexu91h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_60582d94798e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462362/normal_5fcea1611fb85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474734/normal_6049b9a087729.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/zomafomotabipan_fababa_kejoberif_tawonomedawo.pdfIn PDF document text
    • http://academic-club.ru/lapidolefiopl7b.pdfIn PDF document text
    • http://pirugaf.iblogger.org/71614499133.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/vexawuwaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_603e296eb975c.pdfIn PDF document text
    • https://kitigenuripoduj.weebly.com/uploads/1/3/1/0/131070171/xataramet_xujisijujor_zozexaz.pdfIn PDF document text
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/vovuf.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/a98b82792a08fd.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/9260586.pdfIn PDF document text
    • http://temilops.xyz/cylinder_head_bolt_torque_specifications_manual3rg42.pdfIn PDF document text
    • https://fipakitifenilab.weebly.com/uploads/1/3/4/0/134042330/1695623.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://44f39d5c-a655-4437-91b6-62b11e148e71.filesusr.com/ugd/eb4c03_07c44a835b1a4bb9a5d8324fef259cc6.pdf?index=trueIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_76856d31a8394917a411855893943710.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE588 5008 bytes
SHA-256: 2d6e3c1824ba1e716c886c256c169c572d1adb07a5a96091df75e604b699f3ed
font_01_sfnt_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 11348 bytes
SHA-256: 2929d5f8dc9d3a4dd0b7b1664a508e980ccfd5f319441e42f58ed25140796c50
font_02_sfnt_off00011d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f