Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e693b7d92a62caa…

MALICIOUS

PDF

75.1 KB Created: 2021-03-30 22:37:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a284dd492f5104231bd78e34035c693a SHA-1: 799968c8e8d7e4164f966e40d4035d3e15c5dfba SHA-256: 2e693b7d92a62caa42686980cacf94a850a6fcfc1f9437097dfc1e7870ec3d0c
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading a secondary payload or visiting a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/strik?utm_term=water+sports+merit+badge+worksheet PDF link annotation
    • https://cdn.sqhk.co/xadopazo/XugeOji/24729550218.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/lbbRABh/71489751304.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/iggoTdf/sandeep_vivek_motivational_speaker_in_platform.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475999/normal_603d6ffd97432.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/hhjZ9La/master_math_word_problems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5fd0b63bdbdf7.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/ViezkDa/amtrak_schedule_san_antonio_to_los_angeles.pdfIn PDF document text
    • https://cdn.sqhk.co/pubabolab/gxpYWgh/lego_hidden_side_episodes.pdfIn PDF document text
    • http://debesur.iblogger.org/tuduzaxigasolebuko.pdfIn PDF document text
    • https://cdn.sqhk.co/galudubujuwa/Mhf7ehe/morose.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/fatikonavori/amazon_pay_upi_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/battletoads_and_double_dragon_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d9f8ede-c3b6-4e27-82f5-970a788fce9a/zanatosoletalak.pdfIn PDF document text
    • http://nuxidowu.epizy.com/73609500857.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b9edf45-0e05-4864-907f-8abd4ae91c65/tadoxilebasupigilejikas.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_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 5648 bytes
SHA-256: 1f159764651efa63e8a9fb184c08194c90884bc87f2cfe831477af389fe8dcf0
font_01_sfnt_off0000fbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE8 10448 bytes
SHA-256: 27a36f82e97a4db03bf5ae35fcbde954e10aa8e940a69d16af6c99c2fafd94c2

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