Malicious PDF — malware analysis report

Static analysis result for SHA-256 68053451e4830e52…

MALICIOUS

PDF

65.9 KB Created: 2021-01-24 15:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 118121a987361c294be52c85c1a22d8c SHA-1: 7f19ff74293fdbf28034b99d2adad57172c9bc00 SHA-256: 68053451e4830e52ca6b3951a2390bd93c2a2eb9a432e6570339e0096edcfcea
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external links, with one specifically mentioning a product ('keyboard for galaxy tab a 2016') and pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful sites.

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://trafftec.ru/123?utm_term=keyboard+for+galaxy+tab+a+2016 PDF link annotation
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/tuvuzisedenavo_gojepubafuwes_dunibe_regomodozaj.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/star_wars_clone_wars_season_7_episode_12jtuu2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5fe5fcb49c355.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458848/normal_6003ffa847316.pdfIn PDF document text
    • http://all-system7.work/photo_editor_online_free_downloadcb87n.pdfIn PDF document text
    • http://janurikemodowu.iblogger.org/zijifivaruvuvonokuw.pdfIn PDF document text
    • http://aazzzry.space/580_words_level_2jeoc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382779/normal_5fffac737587d.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/xirixepo/togunosanowokofa.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/buvutin.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/delorimaburefugogumutos.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/ieee_latex_template_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/98765032556.pdfIn PDF document text
    • http://xujekapowizi.epizy.com/hills_id_canned_dog_food_feeding_guide.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_off0000c428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC428 5656 bytes
SHA-256: eaaa44e1ae538d2fd21445003748e603e82d470ada25d36fe09f8446d5e33ac3
font_01_sfnt_off0000d795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 9992 bytes
SHA-256: 73cd51e7cf4a5c81cfa37753a34b5e562302b6716b7452a5f3a338efd82e97b9

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