Malicious PDF — malware analysis report

Static analysis result for SHA-256 80503224ce5669d3…

MALICIOUS

PDF

67.8 KB Created: 2021-02-22 00:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d43f5ec2ed295f3ac4fe2c5e1be950ea SHA-1: 1481d2155f7e2f9e95833254f2101f039b17e6ac SHA-256: 80503224ce5669d32e1abf0ffea04387c136b56efe667c796ef2ec2ed508c808
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. The document contains a link disguised as educational content, pointing to a URL that appears to be an SEO redirector for phishing purposes. No scripts were extracted, but the presence of external URIs and the overall detection suggest 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
  • 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://seumenha.ru/wix?keyword=chapter+8+substances+mixtures+and+solubility+answers PDF link annotation
    • https://garowowo.weebly.com/uploads/1/3/6/0/136033653/jidesemutusegabago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_5fd92dccb8ce0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409396/normal_5fed80aeaae55.pdfIn PDF document text
    • http://scoretdho.best/install_mod_menu_gta_5_xbox_3602nn09.pdfIn PDF document text
    • http://frut-tree.site/partes_motor_electrico_trifasico6vruh.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/lixuzo/post_apartheid_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/fubuxumoviwuxepibo.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/wafotisajoredo.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/bone_breaking_dance_videos.pdfIn PDF document text
    • http://sibubixusa.epizy.com/75440469578.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/honey_bee_photos.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/lopojumogiwuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/abrasive_jet_machining_process.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_off0000cb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8D 5812 bytes
SHA-256: 6f279a6ad59a641bd6c2c4171f5054e795b40d3f9a51084c464733ef5d5ceaa9
font_01_sfnt_off0000df36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF36 10336 bytes
SHA-256: 9d1a98b24532c147e437babebeff302a8a6fe62723ec5b917f223edcdda6ccbc

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