Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25b266c170808ac…

MALICIOUS

PDF

66.6 KB Created: 2021-02-27 19:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: ee3c008439bda42f6c39ffb0758495d4 SHA-1: 6ee7d3d6dbd4060c374c034430b3ff86705f9c8e SHA-256: f25b266c170808ace7c796145dd0f65ae6c43438f3110b6d2850832eaf9a577a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://nipisod.ru/award?keyword=dell+precision+t5500+motherboard+form+factor PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414866/normal_601d84db427e7.pdfIn PDF document text
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/6833951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403283/normal_5fff9434ecd0d.pdfIn PDF document text
    • http://presentinsta.site/miller_dynasty_350_help_3198hdg.pdfIn PDF document text
    • http://kekebum.22web.org/top_5_stock_exchanges_in_the_world_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5fccd87e30159.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/fijD1AV/loud_war_sounds_roblox_id.pdfIn PDF document text
    • http://frontglass.xyz/wamonenuxugaxewidezubodwg8u.pdfIn PDF document text
    • https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/gudolir-nibugumirule-govisosevaka-kilevibogubet.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/naloz.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/jefmp8C/dakuborasu.pdfIn PDF document text
    • https://jupikojeba.weebly.com/uploads/1/3/0/9/130968920/8986061.pdfIn PDF document text
    • http://mini-cam2.club/segubimawetorufunuwlfjpf.pdfIn PDF document text
    • https://cdn.sqhk.co/kodivitedi/jhhbxge/fall_of_the_western_roman_empire_timeline.pdfIn PDF document text
    • http://aslixan.com/slendytubbies_download_2dsi7oc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_601bb3f65188d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FB 5800 bytes
SHA-256: 6885e58ab92957fdc631bc716bcd8ae4435c5e212d47c343bee55df43b621729
font_01_sfnt_off0000db94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB94 9928 bytes
SHA-256: 398c14174ed9f74f2b8fa716545c4f23af35343133f5b4ae9659ee46b99a6581

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