Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a591f9a521f8ffb…

MALICIOUS

PDF

80.8 KB Created: 2021-03-13 20:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 06cba1b9c324ae8f375ee86b42c9f11a SHA-1: 37186c0dcf951ed982ae7c4e5468063406087de9 SHA-256: 0a591f9a521f8ffb792e174b4524dbd5fd4c0f329aff9abe74fb49dffdce10d0
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs and heuristic firings, including ClamAV and ML detection, strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the document's structure and embedded URIs point towards a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://lozipotod.ru/strik?utm_term=how+long+to+be+a+journeyman+welder PDF link annotation
    • https://matixibufi.weebly.com/uploads/1/3/0/8/130873880/6811259.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/fijiloni_pefetew_retabupeje.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/jidughL/6055079690.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/ghgggjW/polokaraku.pdfIn PDF document text
    • http://pavedewono.iblogger.org/overlord_light_novel_volume_12.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/igifdjj/kekejesubuxugi.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/midTToC/battlescribe_build_your_army_list._fast._com.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/aM2mgPl/folewobivagakanefov.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/ggjgujd/90207072745.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/ihW1hgi/sometimes_you_die_code.pdfIn PDF document text
    • https://cdn.sqhk.co/nukasiwesex/hhVJegf/up_first_hosts.pdfIn PDF document text
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/zifixa_suwovitaz.pdfIn PDF document text
    • http://wibevuzu.iblogger.org/72910906873.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/cAgjgjq/sefoxusajezodi.pdfIn PDF document text
    • https://cdn.sqhk.co/kofelejezem/fgcoZC1/nba_game_6_live_stream_free_canada.pdfIn PDF document text
    • https://xiwujanif.weebly.com/uploads/1/3/4/7/134705994/sanikafikub.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/cZijNhb/my_at_t_tv_customer_service_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/dgfSxyp/66123780980.pdfIn PDF document text
    • https://vejewumuwuwaja.weebly.com/uploads/1/3/4/7/134759129/8340353.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/HUgithc/piparuginorojisevol.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
    • http://zoxuwabemowel.epizy.com/bizarasoxozufewazave.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/66140934203.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/62550458783.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/53072383153.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/zadagijesa.pdfIn PDF document text
    • http://jekidosokun.epizy.com/article_15_malayalam_subtitle.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_off0000ef22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF22 5172 bytes
SHA-256: 8aec4876f20fb88445901ecac99b7fbae6b6ee8ae49e8047bce6c93c8467d33c
font_01_sfnt_off000100bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BB 11228 bytes
SHA-256: 5bd70a125b110b08c6f2f7a58769bd558e73ffa737fc1f891022b82cf85e0dcc
font_02_sfnt_off000126db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e