Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a359c891270dfe0…

MALICIOUS

PDF

105.1 KB Created: 2021-03-15 23:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 68c151aecba2b1c4431a51731b643197 SHA-1: b7122e3888b608ef223f085e57c35a6955f402b4 SHA-256: 8a359c891270dfe0d796fc2e71941d281802854f9256418528a86d500707ce85
156 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 0.9998

Heuristics 5

  • 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.
  • 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://midufefew.ru/strik?utm_term=can+you+cook+pasta+in+a+vegetable+steamer PDF link annotation
    • https://cdn.sqhk.co/rumoligodo/giiicd3/black_christmas_1974_billy_actor.pdfIn PDF document text
    • https://finubakexa.weebly.com/uploads/1/3/1/3/131383318/luwol.pdfIn PDF document text
    • https://famepajovajegow.weebly.com/uploads/1/3/1/4/131438188/seluvuvovajax-nolugutapefak.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/ehiidDv/mongolian_death_worm_full_movie_watch_online_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_cdd20f231ed045fd9ad83485985b074d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/najuvowagufix.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/alcanos_alquenos_y_alquinos_ejercicios_resueltos.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/55204598351.pdfIn PDF document text
    • http://dajejat.rf.gd/cleartax_form_16_a_or_b.pdfIn PDF document text
    • http://surafupomef.epizy.com/hp_psc_1315_ink_cartridges.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/bexitadur.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/50365157467.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_dcfc5504ab1740308f3da5e92531145d.pdf?index=trueIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_eb47a70d559c448cb91cccaa04525382.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/77379876604.pdfIn PDF document text
    • http://batutadazuva.epizy.com/can_i_use_a_fragrance_oil_in_a_diffuser.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/umbilical_brothers_speedmouse.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_30e8d399cee14b48a23b50b768020df8.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001605e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1605E 5524 bytes
SHA-256: e86e807bd4962848010e279172b6d441d4ba275cf0aa65aed07ee69015e7aa56
font_01_sfnt_off00017325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17325 10752 bytes
SHA-256: d20b9a4fc41b176271f3c295b249d7942f036794953ec08f1ee173ea19fa8ba1

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