Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fee9ed29ebeb67…

MALICIOUS

PDF

81.2 KB Created: 2021-05-30 08:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ec3c49f9054388abfb8d50a5b4005fa1 SHA-1: 4c43121a3ef82b8552e80c310012754bd4a55dda SHA-256: 74fee9ed29ebeb67b0757b0daab4ca564e595a5cbf639c39877731783f43d19a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL being 'https://lozipotod.ru/strik?utm_term=livro+como+trabalhar+para+um+idiota+pdf'. This suggests a phishing or malware distribution attempt, likely initiated via spearphishing. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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/strik?utm_term=livro+como+trabalhar+para+um+idiota+pdf PDF link annotation
    • https://worizura.weebly.com/uploads/1/3/1/4/131437573/9d282d6b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479470/normal_6069713a0a267.pdfIn PDF document text
    • https://sezunugavekavo.weebly.com/uploads/1/3/5/3/135321765/sutujoweten.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_600ffd26aa5e9.pdfIn PDF document text
    • https://zajenutomu.weebly.com/uploads/1/3/4/1/134109216/jadewir-nikog-rexakil-nagomuda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483104/normal_602cd7d0cc07b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485442/normal_60055add8169f.pdfIn PDF document text
    • https://pasiwuguvode.weebly.com/uploads/1/3/4/6/134601834/zopazaze.pdfIn PDF document text
    • https://favunabev.weebly.com/uploads/1/3/4/4/134445728/bivebuka.pdfIn PDF document text
    • https://kawepuwaseleza.weebly.com/uploads/1/3/4/8/134849925/genojalak-nelofetib.pdfIn PDF document text
    • https://bozaveruri.weebly.com/uploads/1/3/1/4/131483492/bewipojila-kizokobipaxot-vidudixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368488/normal_5feb0cc0d0e98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_605fe3ee7799d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447487/normal_600ed881d7361.pdfIn PDF document text
    • https://tujobofawoti.weebly.com/uploads/1/3/2/6/132695409/gonages.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/wavusi-vuronofape-zazep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485161/normal_5fde3a352315a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5fe8f1c1a5a73.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/abbfba46-6096-4e02-affd-1be3ef45a060/what_was_the_texas_constitution_of_1836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b67fa12-66bb-4957-b41e-a1b7bed6e747/40243596826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2eae681-f7f4-4813-94fd-a3ce59498012/nixos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa30c08b-bcd1-4bdd-aa12-60fb7736fd09/muguxoxivifepo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a8a1a0-8cf6-48f4-a59a-4871864173db/how_to_pair_a_logitech_m325_mouse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a95be0-7d40-4468-b79b-6abddc259e4c/xudawazonuxubut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac513ce-b8d7-4277-b9bb-16c04e32667d/sir_gawain_and_the_green_knight_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/078b4ade-4fbb-4a76-be49-b3e0c05ebdd5/pyar_deewana_hota_hai_mastana_hota_hai_karaoke_with_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca14a641-7f07-4dbb-bcb6-5e7be2de02f7/why_my_gas_dryer_wont_heat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/decaf950-ec4c-443a-b126-018403304f5d/mexepoxufejegomovikil.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_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 5356 bytes
SHA-256: 222a857745b5481da96b364e9a1f1bcfac57e649a6c657fda8d85e9e8b210d86
font_01_sfnt_off00010e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E23 13040 bytes
SHA-256: 7acdd872fef2333ac0fb3f153a8e071078a3ef9e5fd36661481c5c85f69bd7dc