Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f11ee98b590d670…

MALICIOUS

PDF

79.5 KB Created: 2021-05-18 22:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6ef48cc863c13d0a92cd696edd1aa061 SHA-1: b024e863effdc669848844acb31eda422d3d344a SHA-256: 8f11ee98b590d670b6c88b7e4f13c66cba2b553eef11fda1e11dd85fdd1bcdb2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to benign-looking PDF files, but one prominent URL points to a suspicious domain ('mezovuduw.ru') that is likely part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://mezovuduw.ru/strik?utm_term=bahubali+2+telugu+movie+mp4+video+songs+download PDF link annotation
    • https://tezefidusipenu.weebly.com/uploads/1/3/1/8/131857758/wudivuvipukebo.pdfIn PDF document text
    • https://nagozexifetuli.weebly.com/uploads/1/3/4/3/134340384/xoxagisarewo.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/5ca692.pdfIn PDF document text
    • http://wavasesinile.22web.org/how_to_get_an_international_job_in_canada.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/7386f4f06df48e4.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://s3.amazonaws.com/jewizopukuni/song_lyrics_in_christ_alone_by_brian_littrell.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/96222178844.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/89363683793.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/how_long_does_it_take_for_someone_to_fall_into_deep_sleep.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/workaholics_dry_guys_intro.pdfIn PDF document text
    • http://domirewuzi.epizy.com/aws_developer_certification_dumps_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/15954553666.pdfIn PDF document text
    • http://dajajubofu.rf.gd/blockchain_technology_microservices_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/jopajukajunepusadet.pdfIn PDF document text
    • http://semerobaragizeg.epizy.com/zowekogajupusek.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/wezizatosimozutugeji.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/coso_framework_principles_and_points_of_focus.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/what_are_the_pillars_of_the_earth.pdfIn PDF document text
    • http://dubuxizomigowab.rf.gd/bell_jar_quotes_love.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/87417641478.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 5720 bytes
SHA-256: 9bf871c91a579fa51ca4157283974a25522b3df9f6ad62420e4abc2e1e465282
font_01_sfnt_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 10468 bytes
SHA-256: d5a445c86bc53f9ee99f56201c045bd6106c311c32977c30e4685a243ae67a73
font_02_sfnt_off0001220a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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