Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2352222839b6e1…

MALICIOUS

PDF

69.0 KB Created: 2021-02-12 19:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b5f92f9a0629a09380258cdbbd9563e0 SHA-1: 10e1db71c5094fa338112b1624c178e43ddbb3f2 SHA-256: fd2352222839b6e1ff979ae05965a14b5889f2de79b412b154e4234df7b76a5c
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the document's structure as a link farm on disposable hosting, reinforcing the malicious nature.

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://seumenha.ru/wix?keyword=que+es+una+proposicion+compuesta+o+molecular PDF link annotation
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/8a7a8.pdfIn PDF document text
    • http://familyit.pro/pebetexilenogisovebalutmayv.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/fe5999c34cb563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fc8e9332bab1.pdfIn PDF document text
    • http://reduslimer.website/double_size_sheet_measurementsz5t1r.pdfIn PDF document text
    • http://creditreportfast.info/wunetepozikupomepokusudomcen4o.pdfIn PDF document text
    • https://zozutogumudeke.weebly.com/uploads/1/3/4/4/134440166/judelikikas.pdfIn PDF document text
    • http://okstore.info/mad_hatter_boss_fight_arkham_origins34rsy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476566/normal_5fcd313c714c0.pdfIn PDF document text
    • http://verifedform.com/tutti_presi_in_giro_highland_arns7dy.pdfIn PDF document text
    • http://begdas.fun/67203731171sxmoh.pdfIn PDF document text
    • https://tiselewo.weebly.com/uploads/1/3/1/6/131606631/799d491ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370304/normal_5ff692a8bd4a7.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/tafogusegabomu/hot_hikers_guide_to_the_galaxy_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/hungarian_dance_no5_sheet_music_for_violin.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/vamawem.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_off0000cef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF1 5140 bytes
SHA-256: 8de75a894ab38f92927099959fb7a295c0c60ee00967e72ebeabb34c73fb2409
font_01_sfnt_off0000e055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE055 11864 bytes
SHA-256: 86e31812842dc57ca9c61f5226bf3f0d33ae655843ac91045b7e40e6acb3648d

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