Malicious PDF — malware analysis report

Static analysis result for SHA-256 be01a30e245400b2…

MALICIOUS

PDF

68.4 KB Created: 2021-03-10 16:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: df1a36da4c12ba2ffdd9f36aac3b637c SHA-1: 2854efa2970686ca69857d3008f71cc5ef1f54dd SHA-256: be01a30e245400b25434101f483047fb0783243b3cff35f19fe4d139fd82286b
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of a link farm designed to redirect users. The primary URL, 'https://pelibifir.ru/award?keyword=jurnal+sistem+reproduksi+manusia+pdf', is likely the intended destination for users tricked into opening the document.

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://pelibifir.ru/award?keyword=jurnal+sistem+reproduksi+manusia+pdf PDF link annotation
    • https://xogudefimo.weebly.com/uploads/1/3/0/7/130775634/medenafisatudus_wuxetoz.pdfIn PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/kinonewerodudilopazu.pdfIn PDF document text
    • https://revunipaletofux.weebly.com/uploads/1/3/0/8/130874393/4840e1e5.pdfIn PDF document text
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/jutavolawojuxovemap.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/90e1e.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/4473af1a54f.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/lodaji.pdfIn PDF document text
    • https://jibajupo.weebly.com/uploads/1/3/1/6/131636806/9bb1e38dc.pdfIn PDF document text
    • https://busajivajikiguv.weebly.com/uploads/1/3/1/3/131384407/08bb3930258b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e5eb2fa1-7429-4bdd-9f06-aebe1c13fe5a.filesusr.com/ugd/607883_a9cd5edd92a5422caa1a6eb3d1178bf9.pdf?index=trueIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_4c2fff34908a4373be1448da07d14ffc.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_49390e6c66174450b47b666c96998310.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae5fc1d-6c9b-423d-80b6-1e5d5b642873/28822398284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c223bd-e33c-4cc0-b409-cfb049a1fae7/ms_projects_online_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10cfbd6-164e-413c-874d-517a8b571915/crossfit_dumbbell_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/ga_bulldog_pumpkin_stencils.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_9f07d3bd20f94c48ade5ffb986b909ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/tegidexasosenavenugure.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_0f4fd9984f7544a3a69a3e42741717d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/how_much_does_a_jeep_renegade_service_cost.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_8bea0aac5fca4b6ab3031e8efbd07d75.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA2 5240 bytes
SHA-256: b3b05e6e08d5e38e9a26618f288798b436cdde3b5d2b41c6157ae6c9b317d3fc
font_01_sfnt_off0000e15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15C 10308 bytes
SHA-256: f265acfa890fc17bb5b8012a9863ece6629a49adec9027ce4d0f060c061a7a59