Malicious PDF — malware analysis report

Static analysis result for SHA-256 109cb6a695e189c2…

MALICIOUS

PDF

92.7 KB Created: 2021-03-19 08:23:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b8bad85f641a06298e74a445ede27c1f SHA-1: 25ecc7966ef677e3f85999fa93aed91aa0db1ea5 SHA-256: 109cb6a695e189c23a5dd6c12eb7ac577cc0d83f0ac5a1702f9d5b91312044ff
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a link farm on disposable hosting, pointing towards a phishing or malware distribution scheme. The primary malicious URL identified is https://jumiwimov.ru/wix?keyword=moon+called+patricia+briggs+pdf+download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jumiwimov.ru/wix?keyword=moon+called+patricia+briggs+pdf+download PDF link annotation
    • http://sarupunojupud.sportsontheweb.net/lapoluju.pdfIn PDF document text
    • https://tepiduti.weebly.com/uploads/1/3/5/9/135974730/3964491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_601e2bbfa79ad.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/head_first_java.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/start_late_finish_rich_free_download.pdfIn PDF document text
    • https://zolerowiz.weebly.com/uploads/1/3/4/6/134691656/ab6d920f1f72a40.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/sony_gold_wireless_headset_review_2018.pdfIn PDF document text
    • https://riwaxetonebena.weebly.com/uploads/1/3/4/3/134363930/dunadorike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5fe651e5b58bc.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/sample_resume_for_pl_sql_developer_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_602eeb17796eb.pdfIn PDF document text
    • http://bozesedixek.mywebcommunity.org/celula_animal_y_vegetal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gototura.myartsonline.com/2154205237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d639433f-bcd1-4720-bf89-24ef40cfb9aa/dudibap.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/motuxagoxujefirunagovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fef7912-a3ac-4813-8e27-932832055835/how_to_improve_teamwork_and_communication_in_healthcare.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/87869838680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98dc8aee-86ca-4b58-b3c8-5420674aef92/12095333064.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_off000126e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E0 5560 bytes
SHA-256: f2867c278a043f0510a9d32b72ffa19c8ed2a82e7a97ef47852ac9427cee480b
font_01_sfnt_off000139f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F3 13020 bytes
SHA-256: 59c15d8c3c8c27f43d718f67fc5d6fe4d98782b29f6813ca44b324f670f64677

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