Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b01b6a7078e4ae…

MALICIOUS

PDF

94.6 KB Created: 2021-05-15 22:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 257de55dd8caa2bc5f6e10dcd54ac4c8 SHA-1: 24dee6f49b2c5772ba8ca4a721a996c1fa0236a7 SHA-256: 42b01b6a7078e4ae67449e3d8d8bda774a312f6c3a191351b7dcbe83c1c41b3b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. The document contains a large number of external links, many of which are part of a link farm hosted on disposable domains, suggesting an effort to manipulate search engine results or direct users to malicious sites. No scripts were extracted, but the presence of numerous external links points towards a T1566.001 (Spearphishing Attachment) initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=bible+story+blind+man+mud PDF link annotation
    • http://excellent-spb.ru/301330053923bi4g.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/pitepid_dedapasek_jawidif_wetupojuxowitu.pdfIn PDF document text
    • http://allerlo.xyz/leruvojumagtaykg.pdfIn PDF document text
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/dakebedi_wujejoga_tebunar_zanovutinal.pdfIn PDF document text
    • http://newyearshop.site/is_yamaha_r6_reliablelv2qm.pdfIn PDF document text
    • http://complerbnp.com/49776873383n8ddn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xapota/what_does_a_health_psychologist_do_uk.pdfIn PDF document text
    • https://7b806e58-2e0f-4c22-b5e1-e0f71c4d6e86.filesusr.com/ugd/8da65f_3c9afe97fcab448ab2ab6f86062fc81f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d6fb88-769c-44fe-83fe-bf8bfe72b10a/41251273831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c65062c-5336-4f2d-bef8-458d2fdba048/commodore_64_games_on_mac.pdfIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_09d6cb47a212440ea94d75c954e90501.pdf?index=trueIn PDF document text
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_92f29eedc74b482fa32d64b56690e495.pdf?index=trueIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_67aac6775ca94880893377ec817de000.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/playboy_song_ringtone.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_9dd74ebb9d994bdcb1ac1be767a50475.pdf?index=trueIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_2a56e3258c9546839ca40af777f12ba9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/que_es_aprendizaje_activo.pdfIn PDF document text
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_118793527b9a43e285e1e51eebd863e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lofese/labokokuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e65515-f181-4d01-92ad-25a0b52185de/pathfinder_campaign_traits.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_off000136aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AA 5264 bytes
SHA-256: d2491091003505bc3ee5e97b4d7dca1a76f11145c32553f393a2cabbaa28790c
font_01_sfnt_off00014876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14876 10844 bytes
SHA-256: 752a56d2ae5b096b9a83fecdac36fd59657c02837acb285d05cd935fa7c05606