Malicious PDF — malware analysis report

Static analysis result for SHA-256 801bdf7277530011…

MALICIOUS

PDF

76.3 KB Created: 2021-03-18 23:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c93dcac6a667750b583476cd0e5eabff SHA-1: 5c076c0e697d72ad23b3d0bdd0c6ccd84f3699d9 SHA-256: 801bdf7277530011c55a4186d4ba0918891257de78c63a5fc75ed09050ab12bd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=calendario+2020+mexico+pdf+escolar PDF link annotation
    • https://cdn.sqhk.co/rebamomidaw/hiJgcge/42558980378.pdfIn PDF document text
    • https://cdn.sqhk.co/pimabosi/cmggpha/disney_sorcerer_s_arena_character_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/SSgg4zK/kenujoxivalon.pdfIn PDF document text
    • https://kanunobak.weebly.com/uploads/1/3/1/0/131070574/26606ac70440.pdfIn PDF document text
    • https://bobiguwifuza.weebly.com/uploads/1/3/5/9/135966914/2223440.pdfIn PDF document text
    • https://nidatufibamukun.weebly.com/uploads/1/3/4/1/134131265/kevigupovu.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/ggLEgep/satowijegujizuguz.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/g53jf4C/home_naturals_fruit_wood_cutting_board.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476146/normal_602e227347209.pdfIn PDF document text
    • http://rapugazif.22web.org/36228755228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482405/normal_5fee45518a8b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_601d21e83c292.pdfIn PDF document text
    • https://fakoronad.weebly.com/uploads/1/3/4/7/134712901/2963852.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/SNhcAXE/gofibufena.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/J9ij0gd/52606878367.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bikikifuxax.epizy.com/normative_accounting_theory.pdfIn PDF document text
    • http://vilolosukip.rf.gd/2939820162.pdfIn PDF document text
    • http://sivabesu.epizy.com/80103604491.pdfIn PDF document text
    • http://mifisabewup.epizy.com/pokaforubiwazanozinowit.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_off0000e6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AE 5548 bytes
SHA-256: c7f0b1541d7b15882a705ca00285df5ef89cc55033d2f9c0719f398b27d89a7c
font_01_sfnt_off0000f975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF975 12580 bytes
SHA-256: 1a1c1e0f658a9da1c54f8323ad96f82d1fb1e31d1b67a54378338b30c05312e5

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