Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7abff920f270d6…

MALICIOUS

PDF

76.3 KB Created: 2021-03-03 06:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: fd2fe05b9a80139d3379467d39a36be9 SHA-1: d25c4688c26c555b1bbb0b3f8e2e38f817b36810 SHA-256: 6c7abff920f270d6ee6bf7e0ce1586658afbb9ec095fb95fb8546fc225399d7d
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Homer's odyssey simpsons full episode', likely a lure to encourage clicks on the malicious links. The ML classifier strongly indicates maliciousness, and the link farm behavior is a common tactic for distributing malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=homer%2527s+odyssey+simpsons+full+episode In PDF document text
    • https://xudujebu.weebly.com/uploads/1/3/6/0/136090205/dcc80.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/japizesafogixom.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/J7hfT4A/don_t_rush_lyrics_kelly_clarkson.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/MOjeQjg/aamc_mcat_score_percentiles.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/37Cdjjb/coupons_for_wishfulprints.pdfIn PDF document text
    • https://bumipavadawafez.weebly.com/uploads/1/3/2/7/132710759/wagisuvigutugivu.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/QfpheeB/walmart_one_doctor_on_demand.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/casio_tough_solar_g-shock_watch_reviews.pdfIn PDF document text
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/fasazapa.pdfIn PDF document text
    • https://cdn.sqhk.co/salavogi/fhbcLVb/minigames_mods_for_minecraft_pe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465691/normal_5fde767d8517a.pdfIn PDF document text
    • https://wejilosadala.weebly.com/uploads/1/3/0/8/130815097/wuvalinemoweko_lotofigofuluzi_baketidaguku.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/b2e454a3e988.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/ea2ghjj/velizilorezirivuvekal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420906/normal_60036be92c092.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/DP8giji/14869422489.pdfIn PDF document text
    • https://nupetumagapet.weebly.com/uploads/1/3/1/8/131859993/4085362.pdfIn PDF document text
    • https://zuvexege.weebly.com/uploads/1/3/0/8/130814851/7032798.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448556/normal_5fdfa4ea1102b.pdfIn PDF document text
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/48edecf08b3bf7.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/gr9Sggn/derad.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/ihickge/wood_lathe_machine_for_sale_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_602e7f74ab0a9.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/75997259621.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maretubozewugi.myartsonline.com/32186368130.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_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 5072 bytes
SHA-256: 566ca1ba21e86cb03f038881974667736fdf9d97d78f6bbc3e2831c2c6c18a3e
font_01_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 10420 bytes
SHA-256: a5c8bfd39ea27917c56cb78ed1015426caee87d7fea124f41388386681cd1a4d