Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa4393ba05a9729…

MALICIOUS

PDF

85.5 KB Created: 2021-05-19 18:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 78f3427a74f1a5372510a21dd4147a78 SHA-1: b80e1501d07b2a508bb168d9fb2e5e01aea99234 SHA-256: 2fa4393ba05a972999ba58462756ac2927a4d556e4b55821e8f88e513caebe0b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/wb?keyword=linksys%20re6500%20ac1200%20max%20wi-fi%20gigabit%20range%20extender%20/%20repeater PDF link annotation
    • https://tupetipu.weebly.com/uploads/1/3/4/4/134489263/natuxizosif_zapov.pdfIn PDF document text
    • https://kedadatiwuji.weebly.com/uploads/1/3/4/8/134891749/viterumam.pdfIn PDF document text
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/tojiwagutonivip.pdfIn PDF document text
    • https://lotunesu.weebly.com/uploads/1/3/0/9/130969364/pefab.pdfIn PDF document text
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/penenoxonora-nujenugomexeka-toxuxaf.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/e2a83.pdfIn PDF document text
    • https://papafamibupa.weebly.com/uploads/1/3/0/7/130775965/puwij-guduwukalol-xozipomaz-bedoxugapoz.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://uploads.strikinglycdn.com/files/f3200dce-1e02-4a0d-89be-12a7303e6c19/repapabemega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05da8aba-eff3-4fa8-bffa-53859afe1a41/case_580_super_k_backhoe_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461955e0-1bf2-4ebd-a648-56b8cac8a996/sap_tutorial_for_beginners_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa719f4-b72f-4a67-9ee2-4b1b6204748f/mevubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b82ae47c-1d74-4fe9-8450-2a601cfe5dde/verbos_en_ingles_regulares_e_irregulares_en_presente_pasado_y_participio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6198f148-afa8-48cb-9d33-6ed99aad87ab/84332700306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/681155f2-e2ee-4e82-a557-343796dd6846/44169975358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbd846a-31dc-4951-9909-c27533cdcdbb/ap_human_geography_unit_3_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13602a18-0cd8-4984-a702-e929425dedbe/9167367749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad2e4a0-0a17-48e4-bd6d-7f504f2033b2/they_say_i_say_the_moves_that_matter_in_academic_writing_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef4623e6-8370-41c6-8e2b-f959ccd002b3/89177196792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e80fb4-38eb-4455-8939-b50bc6b07353/percy_jackson_the_heroes_of_olympus_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638e582a-3836-46b5-928b-be46e52b12f4/95516357949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d50c35-3649-4ded-aa3b-26ffe3eb395c/51814085218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be29883-5b0e-4efb-a04c-98550d13f386/vodelukugikaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cacfd5f1-003d-4997-a526-1f5cea1a46fe/momujamitivisokuxafipoxut.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF12 6200 bytes
SHA-256: 48dcccbfe09671f3891c0ee326da866fae5e47e1f72c9d22a8169af29b0ea3f7
font_01_sfnt_off0001143d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143D 10980 bytes
SHA-256: d65d66a6ccf33b5d5e92f0d28c0f9d415ce8dee534b44b2f09f6d1bd953f1034
font_02_sfnt_off0001398f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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