Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60a7071c5df46bc…

MALICIOUS

PDF

92.1 KB Created: 2021-02-27 09:34:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 15e3c2f20153f5a85f2eb388dad126a7 SHA-1: 43e8957d18ce07cd6ea815e7d4e3c9f568974275 SHA-256: a60a7071c5df46bc3f65221385353da2b5d95842c538d98e380030553dd81fc5
126 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 multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with several pointing to disposable domains and potentially malicious content, suggesting it's part of a link farm designed to distribute malware or phish users. The document body, though heavily obfuscated, contains metadata related to SEO keywords, reinforcing the lure aspect.

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://xajibur.ru/award?keyword=10+ejemplos+de+dispositivos+de+proceso PDF link annotation
    • http://hookup153.site/zapopo6njw3.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/Bibiejf/define_breadwinner_origin.pdfIn PDF document text
    • http://jolixasij.sportsontheweb.net/95954505043.pdfIn PDF document text
    • http://gegejobusi.22web.org/23512681370.pdfIn PDF document text
    • https://cdn.sqhk.co/bodorosuzuta/DMjeUYq/callbreak_multiplayer_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_603813a48bc1e.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/eijIGYU/alien_zone_raid_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/hhh3jhr/5637957023.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_6026b3be78d4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_6032ce51ba50c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tujefuguxofela.rf.gd/asgard_s_wrath_performance.pdfIn PDF document text
    • http://sexuduwivaz.rf.gd/get_more_followers_on_instagram_apk.pdfIn PDF document text
    • http://kuxatirimupuv.rf.gd/movie_apocalypse_now_1979.pdfIn PDF document text
    • http://mizixizomafupez.epizy.com/55601005467.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_off00012959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12959 5244 bytes
SHA-256: 44163f4da1393bdb5c9b4a1d16e8367077a930b6cd2c9bb71ea474321209de42
font_01_sfnt_off00013b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B27 11848 bytes
SHA-256: 927f943c9dbf29390409243864057f633d49dc63a4b81f5761d3041d6c920517

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