Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e23e2d55e10074…

MALICIOUS

PDF

77.3 KB Created: 2021-03-01 16:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 59a25ca42299d00d2f7854f80e063fbf SHA-1: 0d67d46245ebc56513062bf91a3cbd223ed3ad10 SHA-256: f7e23e2d55e10074af64633cf7028b1d08a3ffc08d617dde5968d54452cb819e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. Heuristics indicate it's a malicious PDF, likely used for phishing or distributing further malware. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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/wix?keyword=kur%25C4%25AB+dog+breed PDF link annotation
    • https://cdn.sqhk.co/bupitagalir/gfYoLZv/biriwigetozadunefiweg.pdfIn PDF document text
    • https://cdn.sqhk.co/dutigimomana/ggtghji/44707819673.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/le_corbusier_five_points_of_architecture.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/Fjcwhic/superhero_invitation_maker_free.pdfIn PDF document text
    • http://reflectionss.space/rogodugivbafl1.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/dvggghr/thoroughly_modern_millie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikuzi/zicpiyk/rabiworunovuki.pdfIn PDF document text
    • http://doctora.club/blue_light_glasses_target_in_storezvh3w.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/RJhhjcT/34495318101.pdfIn PDF document text
    • http://slimitalia.space/93391612802q0rod.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/f0gchak/super_penguin_league_3_sunneestyle.pdfIn PDF document text
    • http://ionatr.fun/charam_sukh_web_series_freeo6jk1.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/when_was_the_great_depression_in_canada.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/12972917192.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/hcggXic/vmotion_glitch_video_editor_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/jf7hdhb/86805721003.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/hegGBxN/classic_piano_price.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/haEjeor/nobifupazupeluv.pdfIn PDF document text
    • http://sushibara.net/modern_world_history_patterns_of_interactionaymkx.pdfIn PDF document text
    • http://tevfikyuce.xyz/bisiguwozotexujupililajudykpxg.pdfIn PDF document text
    • http://xteenware.online/nigonuritosimodu6wq3g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rususekobijo.myartsonline.com/didawavudolatabosuj.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_off0000f2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A1 4728 bytes
SHA-256: d5226b38c7f0150126c5a852425dc0bbe514971bc4fe4c9472e2677cc60d097e
font_01_sfnt_off000102d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 10464 bytes
SHA-256: e5fbbf39f65118c8928cccd74042664167163eec17f8713751c7801c3531557a

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