Malicious PDF — malware analysis report

Static analysis result for SHA-256 082de7c9f743bf5f…

MALICIOUS

PDF

69.1 KB Created: 2021-03-04 16:05:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bb5e43cb63757ee0f6f6e3c4bae682bd SHA-1: def8bc85c25ef94600cefe70a163c47829d9a4e6 SHA-256: 082de7c9f743bf5f4c2b7ca1ca4f5264e7b39fc940482d32f8c8efb3d79a612a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with many hosted on disposable domains and utilizing UTM parameters, indicating a link farm or phishing lure. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

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://druttle.ru/123?utm_term=dcs+su-25t+english+cockpit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496015/normal_5fe9bb6d4fbf1.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/7hcdVvo/43610999204.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/1174417.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447437/normal_60014818810b6.pdfIn PDF document text
    • http://importants.space/10692355307i4agc.pdfIn PDF document text
    • http://sabizomunutaf.22web.org/7226826062.pdfIn PDF document text
    • https://cdn.sqhk.co/tarudifirew/JIsifQU/61619912525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_6036dfc19e74b.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/ghehdKU/nadopezovepuwedit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fff55f3185a2.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/jfcgdvH/wisiz.pdfIn PDF document text
    • http://verenica.net/jaratemazavuveeo5wh.pdfIn PDF document text
    • https://cdn.sqhk.co/dedomafub/1Hsyojb/cartoon_cat_minecraft_pe_mod.pdfIn PDF document text
    • https://memabalizova.weebly.com/uploads/1/3/4/4/134490842/1596990.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/nazekisigiduz/doodle_god_apk_mod_full.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/duradoxodorabem.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/arundhati_film_video_songs.pdfIn PDF document text
    • http://zuronixo.rf.gd/podivosimijiluxuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/happy_birthday_images_for_friend.pdfIn PDF document text
    • http://dexidije.epizy.com/boolean_logic_gates_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/zagemikofazasejafu.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/ccna_course_syllabus_2017.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAE 5240 bytes
SHA-256: 41a8e34226a460bb82aa4b14df2e118ad65b425cfafabb7489f3d490956e42d0
font_01_sfnt_off0000df9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9D 11972 bytes
SHA-256: 734693b4367ba3d20d1478f244e796cdae322e02c1ddaf27c444b9a575060407

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