Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b779095fb6aa87…

MALICIOUS

PDF

85.8 KB Created: 2021-03-24 23:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9fc1e80ad5f8fcab7901853b0e588e23 SHA-1: 1a130606e9c9503f854219d678ca4e39ab75d009 SHA-256: 62b779095fb6aa87e174481db547ba8cc58b3121abe516051bd9321e9580656a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=what+are+the+key+elements+of+a+poem PDF link annotation
    • http://dehydratedoriginalgoodness.com/69297743045yfv40.pdfIn PDF document text
    • http://livethailand.fun/146021844274ri7v.pdfIn PDF document text
    • http://azorocheat1.xyz/just_2_words_plus_level_55mt0qk.pdfIn PDF document text
    • http://torchqbfl.fun/ftce_general_knowledge_reading_practice_testqffpk.pdfIn PDF document text
    • http://generalmassage.online/final_fantasy_16_release_ps5xnshr.pdfIn PDF document text
    • http://bedating.online/xafezibuh534u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redapisepiwu.epizy.com/rarosisit.pdfIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_a1579ac9affb46199346feca09ddc962.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/78835547555.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_85191280a6894328bf2bc380becd2ce8.pdf?index=trueIn PDF document text
    • http://zimozovo.epizy.com/supidixakenol.pdfIn PDF document text
    • http://rigirulame.epizy.com/lajamodigoxa.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_6a0325693e534893a0e79c0a931ea435.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/how_to_improve_print_quality_of_hp_sprocket.pdfIn PDF document text
    • http://pejinubonuxus.epizy.com/5252460314.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_7d4d73f08bcf4e62b97a3cbfe3424d7e.pdf?index=trueIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_27857938e5e441958820abab16ba65f2.pdf?index=trueIn PDF document text
    • http://tupudenijusab.rf.gd/patamabikerobevaburuja.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/81193632958.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

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_off000110f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F6 5320 bytes
SHA-256: fae6970750c9ff25b616b446ddb5cc9860e6732d068b729cceecd7af2c6bce42
font_01_sfnt_off000122f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 11428 bytes
SHA-256: 6dcfb42946eff932ec1ce47a5a8afd34e4a21ffef6114e72e1c5e4d6b76895ad

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