Malicious PDF — malware analysis report

Static analysis result for SHA-256 979745908f1e5144…

MALICIOUS

PDF

126.7 KB Created: 2021-03-08 18:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 196e80609b7eef1bbe58166ace30375e SHA-1: 5eed514f1192de0c9ddd3437ba2ced1fdf35b103 SHA-256: 979745908f1e5144d53e93e8db4b56c418463a877ea93f0dca092a21d546bce5
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=laporan+avertebrata+air+pdf PDF link annotation
    • https://patoduwewoz.weebly.com/uploads/1/3/1/4/131483118/sepagumode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454543/normal_600a1cdc96093.pdfIn PDF document text
    • https://durunefa.weebly.com/uploads/1/3/4/7/134712847/4273596.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/xevepejipavafas.pdfIn PDF document text
    • https://bupuzufemu.weebly.com/uploads/1/3/1/4/131452870/3924913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460686/normal_60464cfea4505.pdfIn PDF document text
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/969058e.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/7452404.pdfIn PDF document text
    • https://mokoxobijukox.weebly.com/uploads/1/3/4/3/134321678/0b27cb0.pdfIn PDF document text
    • https://xekobemakisusij.weebly.com/uploads/1/3/1/4/131438823/890516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473445/normal_602649957d1fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465147/normal_5fd888232fc62.pdfIn PDF document text
    • https://sexomimafu.weebly.com/uploads/1/3/4/3/134311134/7684020.pdfIn PDF document text
    • https://fuxovibafisiboj.weebly.com/uploads/1/3/0/8/130874455/e75b0.pdfIn PDF document text
    • https://lotekine.weebly.com/uploads/1/3/1/3/131381428/dototi.pdfIn PDF document text
    • https://kokujilu.weebly.com/uploads/1/3/1/4/131453241/763711.pdfIn PDF document text
    • https://kojaxinepizoju.weebly.com/uploads/1/3/1/8/131856409/3776320.pdfIn PDF document text
    • https://dejoputaxili.weebly.com/uploads/1/3/4/7/134763817/mewexeta_safen.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://uploads.strikinglycdn.com/files/245f63c8-293a-4f64-980f-4a935aaae8b7/17940863479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c91f377-2c6e-46ea-8644-3dbc3bb1f914/96869069258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6706d114-5631-4bfa-8c06-37f0fb0b4199/southwest_insurance_agency_grundy_va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4732aaf-3d01-4fee-b898-6a274faa4966/dress-down_day_meaning_in_spanish.pdfIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_506ce01966ae47278a8f8c0226fc64d0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dfbad18-3cae-4725-8c46-74001c61a8d4/ameritron_al-80b_instruction_manual.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_8fc886e1a17d4c98902d293a1330d481.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_off0001a6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6BD 4752 bytes
SHA-256: 34ba657666535b150ec7650abb3bbb59094c8d68e9b88e55306fd93959d9caf2
font_01_sfnt_off0001b6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6EC 11904 bytes
SHA-256: 49bf58d2b92083b949aca67309cfc22821c3387aecedfeab0f3e47995089e049
font_02_sfnt_off0001debf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEBF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361