Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a607c19bb9d4434…

MALICIOUS

PDF

73.4 KB Created: 2021-05-16 20:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cb1d9f425acda82dee056835a4fa9eb0 SHA-1: 8e104419bcec0dd1a83a5468ce8c5df27f3fe8a0 SHA-256: 5a607c19bb9d4434efd024a2f77500e1a3ac6fa9612f7be41a57f78355c6202f
186 Risk Score

Malware Insights

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

The PDF was identified as malicious by ClamAV and an ML classifier, and contains a large number of external links, indicating it functions as a link farm. The primary URL, https://botokaw.ru/strik?utm_term=is+parental+alienation+a+crime+in+florida, suggests a potential phishing lure related to legal matters. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=is+parental+alienation+a+crime+in+florida PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481406/normal_5fdac62feb6d6.pdfIn PDF document text
    • https://fetezubusob.weebly.com/uploads/1/3/2/6/132681625/zomami.pdfIn PDF document text
    • https://cdn.sqhk.co/miweguzeg/tgif5BF/stickman_the_fight_game_mod_apk.pdfIn PDF document text
    • https://nidoziba.weebly.com/uploads/1/3/0/8/130873853/76da9b4253a53a.pdfIn PDF document text
    • https://cdn.sqhk.co/xifobariw/gfgiQcC/battleship_north_carolina_half_marathon.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/tUQgcge/bs_operations_management_salary_philippines.pdfIn PDF document text
    • https://mufamemibota.weebly.com/uploads/1/3/1/8/131856380/3950306.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/70951630078.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/y1hercJ/teddi_mellencamp_dad_net_worth.pdfIn PDF document text
    • https://wajiwojoduposop.weebly.com/uploads/1/3/1/3/131379590/17b25f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_603cf5c436e84.pdfIn PDF document text
    • http://munasimowijuxi.getenjoyment.net/extended_backus_naur_form.pdfIn PDF document text
    • https://katexiru.weebly.com/uploads/1/3/4/5/134576370/ziwomijisatejeb.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/siejjW3/pozubebufuwasovugosiduze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/db99f814-fc90-47e3-8703-c80430dbfa45/who_makes_durostar_generators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b144c7-7861-4089-b95c-c8db47890335/what_are_the_characteristics_of_egyptian_art_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27010bc-6d80-40a8-92d1-fa2a728b5b43/65080580439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa52566-b815-4436-801b-8abe948973da/maytag_bravos_xl_dryer_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1511c190-c3a5-4f51-8cb1-967d645fe6ef/que_hace_un_lider_tecnico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec062c7b-354b-4a4a-a545-49cc79d6cab4/19744658622.pdfIn PDF document text
    • http://xovefopu.myartsonline.com/60499852559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b7dc7f-cdb7-4b09-ad96-c96ef3b3871b/herman_miller_aeron_side_chair_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0064f06e-0318-4de1-99d7-4c4241fb2624/tufimasidapefuvupul.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 5236 bytes
SHA-256: cd804967b7c616785d4e22a2b523f374d545002fa4fadd8b461b9b3e65808065
font_01_sfnt_off0000f43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 10548 bytes
SHA-256: 1d52d9a5396d26ca8faac2a22369255a4010ee358df4b32323a37b6fc152844e