Malicious PDF — malware analysis report

Static analysis result for SHA-256 03085f2986e72ef7…

MALICIOUS

PDF

78.4 KB Created: 2021-03-06 11:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7de8a3858de81d12ccdd80673b331aab SHA-1: 1169f16dbaa4155ba3c26903f72ee81569c3376a SHA-256: 03085f2986e72ef70272e0c9cce1b253b60622218c82d535ba34d968c9deaef4
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 0.9993

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://xajibur.ru/aws?utm_term=impressora+hp+laserjet+p1102w+offline PDF link annotation
    • https://cdn.sqhk.co/levowexesu/4jb1bBs/change_lock_screen_shortcut_mac_mojave.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/iibjcPM/72682010994.pdfIn PDF document text
    • https://bagerukuvimi.weebly.com/uploads/1/3/2/8/132815916/c3eefa7b7e5fb8a.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/bhhiyIV/92519091624.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/38d1898.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/igdjgdh/marketing_strategy_examples_for_new_product.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/jhbNjj1/fox_sports_mlb_scores_today.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/h2UaKid/giant_square_for_instagram_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gotulurowav/jPFghw6/virtual_sim_story_dream_life_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/iLhdYhi/ship_sim_2019_mod_apk_happymod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481825/normal_603032a27721e.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/ajeligH/mawawalimig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_6017033b50164.pdfIn PDF document text
    • https://laropavo.weebly.com/uploads/1/3/4/5/134585926/68d070f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_5fd7afaf5d063.pdfIn PDF document text
    • https://cdn.sqhk.co/bimeniwog/bifjjLS/magujemido.pdfIn PDF document text
    • https://cdn.sqhk.co/rokabumake/jaI2iiP/givawixaruzelezulalexare.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/f574f9b2dd55c45.pdfIn PDF document text
    • https://zabavorurexezab.weebly.com/uploads/1/3/5/3/135314693/595177.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e8329085-1058-49d3-a03f-79dfd6d7647e.filesusr.com/ugd/f96b02_c0ac1fee62374f70aad769b6479631de.pdf?index=trueIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_ec5604425c4e4b93892cfb7488107de1.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_76cb480aa4cc4511a9f9e8af1d243d1e.pdf?index=trueIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_0c64dfa889a44fd0a22b8ea8965e6ac1.pdf?index=trueIn 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_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 5572 bytes
SHA-256: b001d443b3ced343164dd4c782249ce9069b52285d78a783c99dfcbeb9765839
font_01_sfnt_off0001082d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 10504 bytes
SHA-256: e3231e4ee8214ff580853cac6eb3c68d1bb1022a8e1bb8f10e995e9c29f028df