Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b46e7ff6fbb4d16…

MALICIOUS

PDF

77.5 KB Created: 2021-03-25 23:34:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ac21211723503fb313c6dd23b872826b SHA-1: 50457ef063773496e2e243d67ebf8095e7b7c137 SHA-256: 3b46e7ff6fbb4d16586e383973e8998970cb73b8febd52ebc0eab66e69c5864c
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, exhibiting characteristics of a link farm. It contains numerous external URIs, many pointing to disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The primary purpose appears to be driving traffic to a network of linked pages, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=how+many+hours+a+day+do+navy+seals+train PDF link annotation
    • http://sewutaf.iblogger.org/kerala_psc_bulletin_2020.pdfIn PDF document text
    • https://dulifemubal.weebly.com/uploads/1/3/1/3/131398350/7d8071.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/ihjekge/second_galaxy_vs_eve_echoes.pdfIn PDF document text
    • https://kojovade.weebly.com/uploads/1/3/4/6/134681743/worar_divovofujozi.pdfIn PDF document text
    • https://melonugijiroduk.weebly.com/uploads/1/3/5/3/135325977/duvedifilejubav.pdfIn PDF document text
    • https://vijibasotaxeja.weebly.com/uploads/1/3/5/9/135990507/lazatodiwumolij_mefuzosoxuvavum_dawotifawu.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/igiaUhi/100_arcade_games_in_one.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/hbtyijU/coco_bubble_tea_near_me_now.pdfIn PDF document text
    • https://samaruwopag.weebly.com/uploads/1/3/0/7/130738554/4926296.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xewujurobozum.rf.gd/stuff_matters_mark_miodownik_review.pdfIn PDF document text
    • https://b1b0174c-961c-4936-87f6-765e1132391e.filesusr.com/ugd/6cf804_19699b339beb44d19b5edd0d55237609.pdf?index=trueIn PDF document text
    • https://4095172d-bd2f-4181-91d7-dd424e653400.filesusr.com/ugd/df73ab_43914004b50a403ba0bbf90b59fb91a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizup/gta_5_social_club_pc_free.pdfIn PDF document text
    • http://navefifidarep.epizy.com/51026493431.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/blocs_templates_free.pdfIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_213a76d9da084382862d9ff71a34cae4.pdf?index=trueIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_e1d257a03dd04ea1a059b6021555a893.pdf?index=trueIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_3cdf9cff7f994381bc36722d2fe59ef6.pdf?index=trueIn PDF document text
    • https://3228dc58-b2c1-4aed-ac20-03fc52793822.filesusr.com/ugd/43afbb_639efc93e3ff43969fd8408687f025ea.pdf?index=trueIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_956cc4e52a264528bca5efcd4a72b25f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuses/80907130930.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/83378778756.pdfIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_5053c27beca2423cafc3f9047b47562f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/mazinoziwid.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_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 5280 bytes
SHA-256: ae7d439bbd3b33b505170bdcb593131b3fc2f94e022e17d6afba38e5d1fdcd18
font_01_sfnt_off0001016b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 11716 bytes
SHA-256: 738d8560df7e83a847c3df1c1e6c128c17af1ee46e81db3d304707f27e74913e

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