Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb0d0e11b42eae1…

MALICIOUS

PDF

77.0 KB Created: 2021-02-28 17:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 47eb5679a4a79364a498f41ef63afbfb SHA-1: a48edbbff262309111295c3cccadc996a122f5fe SHA-256: dcb0d0e11b42eae1441c6328d9eea6196731f53020ad94093a20808a7d230dea
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 embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

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
  • 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://fokemale.ru/123?utm_term=what+does+12+mean+spiritually PDF link annotation
    • http://guitar.su/present_progressive_tense_worksheets_for_grade_486fk5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408993/normal_5fcb4286cd617.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/jupaduv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449172/normal_5fddf75de5e5f.pdfIn PDF document text
    • http://betmoy54.com/when_you_wish_upon_a_star_lyricsl0c9d.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/81970548055j66l0.pdfIn PDF document text
    • http://stavki-na-sport.site/kebosusomimura6fkt6.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/swashbuckler_guide_5ezp40f.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/cen-tech_battery_charger_manual.pdfIn PDF document text
    • http://nickned.me/77515357226suoo3.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/the_conference_of_the_birds_book_5.pdfIn PDF document text
    • http://cabinetshub.xyz/life_death_and_meaning_david_benatarawxgw.pdfIn PDF document text
    • http://lemakomude.sportsontheweb.net/gugukomemoxirovosupo.pdfIn PDF document text
    • http://enots.space/antilog_table_file_free_downloadqvl7t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wolobugoxew.myartsonline.com/30151507271.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 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E7 5380 bytes
SHA-256: cd07b71d5655468297e62e975e4c22a23a3064d01abd07429f048c07e3b90c77
font_01_sfnt_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 10528 bytes
SHA-256: e5fe5410050c8142afe902918edd0fbe9a5f54583db0e21a5577144df4b69900
font_02_sfnt_off00011922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11922 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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