Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9605136890d074…

MALICIOUS

PDF

75.9 KB Created: 2021-03-24 02:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 61e34e7ef2621fdddbdcc939bd6670c0 SHA-1: 499e5a722a4a2550e0623a3f92152a9f108cbc3d SHA-256: 3c9605136890d0748128087934c3b8e9ff88210c0ff1a975c5835a7899b6aad1
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 ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users.

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://gimoguvi.ru/wix?keyword=crescent+rose+transformation PDF link annotation
    • https://fewanisip.weebly.com/uploads/1/3/2/7/132712603/wipixun.pdfIn PDF document text
    • https://pufoxedoj.weebly.com/uploads/1/3/4/4/134438994/seboduribojida_fozezarekujomar.pdfIn PDF document text
    • https://xuvivodoxanujo.weebly.com/uploads/1/3/5/3/135308848/8da3b.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/bodyboss_ultimate_body_fitness_guide_free_download.pdfIn PDF document text
    • https://fenibelamej.weebly.com/uploads/1/3/4/4/134464240/lurobiw.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/grief_stages_kubler_ross.pdfIn PDF document text
    • https://satepiwe.weebly.com/uploads/1/3/5/3/135350267/nifewikuxasolulozu.pdfIn PDF document text
    • http://womirewuzakuf.sportsontheweb.net/34103681251.pdfIn PDF document text
    • http://dulisakip.medianewsonline.com/xuzefetofogojomaforo.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/citizenship_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3a0d5408-2ea1-4258-8d29-5d96341cad2c.filesusr.com/ugd/79cb75_19523dfd61784cb98cdc9489b4c3e7c6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/meludav/wipuwowizuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f51d22-c3dd-43d2-98de-1ebc97844dba/owls_nest_esplanade_by_night_shift_brewing_boston_ma.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/98904143043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f42e78-e921-4116-babe-c265a89c8b92/valaporonagitewufutidex.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_66ac9ba2c80047f5ba922a60d1c142bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b55adbe-e9bf-447d-8a8b-e438bc9d2c84/how_much_to_fix_a_dishwasher_pump.pdfIn PDF document text
    • http://ganuxujerotapu.epizy.com/after_effect_cs6_full_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/how_to_analyze_data_in_qualtrics.pdfIn PDF document text
    • http://lenegimuni.epizy.com/udise_code_school_report_card.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_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 4900 bytes
SHA-256: 8737277868be7f917a07a9fdfea215f7d31810dcb05804e8ecbf7539ba54864c
font_01_sfnt_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 10684 bytes
SHA-256: fbc96d71cc5b0153d61fa8700677a3367c006b6752b5d1a14bbad99475fdee2b