Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3896c286d308d68…

MALICIOUS

PDF

86.4 KB Created: 2021-05-12 23:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f07c9382e6639082324992d91418bf50 SHA-1: 4cdc0e8052f0088710d2b93274ac58b7cfa174b8 SHA-256: e3896c286d308d687c0af0b3e6a5c02ba7ba253131ea0e6593e39c9bf0df7bc4
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 phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of redirecting users to potentially malicious content, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=what+is+the+best+eer+for+air+conditioner PDF link annotation
    • http://allfreebets.ru/60256597892lncty.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/hHgjgge/callaway_gardens_resort_hotel.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarasam/fvlCVgh/screen_recorder_with_audio_android_9.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/5634316.pdfIn PDF document text
    • http://shopeuro.pro/maus_implement_damascus_arkansasngu1j.pdfIn PDF document text
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/gaver.pdfIn PDF document text
    • http://submonster.xyz/django_zorro_comico1o2f.pdfIn PDF document text
    • https://tewawabuse.weebly.com/uploads/1/3/1/4/131437503/42c16.pdfIn PDF document text
    • https://pomulopegodetom.weebly.com/uploads/1/3/1/3/131384256/3915417.pdfIn PDF document text
    • http://douchehq.xyz/77318344424y9a7j.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/dnojd8r/simple_disney_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/ibE0hcT/86155754909.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/english_to_bengali_letter.pdfIn PDF document text
    • https://fezagigix.weebly.com/uploads/1/3/0/8/130813643/304ca0.pdfIn PDF document text
    • https://kalogipewaga.weebly.com/uploads/1/3/4/5/134595512/vibepuver_mefobeb.pdfIn PDF document text
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/lusoneraxeki.pdfIn PDF document text
    • https://cdn.sqhk.co/jejefudebuxi/Mhi5jaZ/gravity_falls_season_3_2020.pdfIn PDF document text
    • https://rozonamofo.weebly.com/uploads/1/3/4/7/134751518/227226.pdfIn PDF document text
    • https://kefubawivamati.weebly.com/uploads/1/3/5/3/135304753/metunotefe.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://99ca13e2-8bf0-45b2-93fa-bbfb519f101f.filesusr.com/ugd/5392be_2582570363764707955d15b7e956110c.pdf?index=trueIn PDF document text
    • http://poxobigijeteri.rf.gd/photosynthesis_and_cellular_respiration_cycle_worksheet.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_ecbd0af5809c411d952c47afe0f837e3.pdf?index=trueIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_a733a26921924f51a426a74808bada3c.pdf?index=trueIn PDF document text
    • http://godamelo.epizy.com/mivoleremelir.pdfIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_1f768581eed745d5a712e9a9d6a3ca34.pdf?index=trueIn 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_off000106a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A1 5020 bytes
SHA-256: ce5280a962e7e743eb0d13b343f47299a146cfaa5f20de3bbb89b2e6b78c8475
font_01_sfnt_off000117a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A6 11132 bytes
SHA-256: 032057f594ac580879d75d28ff1deac28292258fb9f196ec74137d2c547cda58
font_02_sfnt_off00013db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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