Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f02094c79c59da5…

MALICIOUS

PDF

75.9 KB Created: 2021-01-29 18:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 388bca11b2cda5eff436f37d4716d9bd SHA-1: c53b888bf4598873163328bfa21b7e23a03c0d8b SHA-256: 6f02094c79c59da5a93d7111b603503a750499c962b568c4ad2fc143d20d9de1
186 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 6

  • 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.
  • 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://jottigo.ru/123?utm_term=ffxiv+sam+rotation+lvl+50 PDF link annotation
    • http://mebelintera.ru/jiborejizirubenemada62lb7.pdfIn PDF document text
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/vipufufoloji-fivani-zokava-nobarisomeju.pdfIn PDF document text
    • https://ziwobusomuka.weebly.com/uploads/1/3/1/6/131607005/texil.pdfIn PDF document text
    • http://boomua.site/seesaw_logo_picturesbki5b.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/xlibieU/98274006685.pdfIn PDF document text
    • https://puvomowaja.weebly.com/uploads/1/3/4/3/134318832/turodowuba.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/e7hhfgi/piano_game_online_play_4j.pdfIn PDF document text
    • https://wedemewimobuxet.weebly.com/uploads/1/3/4/3/134309086/5f8ca20840d7.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/Thagjge/candy_molds_for_edibles.pdfIn PDF document text
    • http://susurrus.space/befopakuxabafebekivawiwazlf1r.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/hf9rbgd/dadugofogolejere.pdfIn PDF document text
    • http://pycnidwzxc.info/13929208768yaaf4.pdfIn PDF document text
    • http://rfs.team/bitcoin_wallet_blockchainpvotz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fogibi/87941408094.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/hotstar_app_tv_show_free.pdfIn PDF document text
    • http://razogop.epizy.com/gakotesixi.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_off0000e6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AD 5264 bytes
SHA-256: 346a128718421723c562dc1eb805dde68b43d0e7c8d00ec56d62fe3cba245eb3
font_01_sfnt_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 13044 bytes
SHA-256: 64df07d552e665ac7cdc0bab5a61fee63ff3723267b8bbcf5b91dc67d1b8a4ea