Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea13d9d1de564a9…

MALICIOUS

PDF

72.0 KB Created: 2021-01-20 17:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bdd9715508705110192fb81670009d62 SHA-1: f988377155ff33c1f76955e63e92d641a4cce3b4 SHA-256: dea13d9d1de564a9d4e1ee946c95baf36afa2eaa6d9ce272885549ef5d00f7eb
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 external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

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://druttle.ru/123?utm_term=algebra+formula+sheet PDF link annotation
    • https://site-1174394.mozfiles.com/files/1174394/tenazozatekigom.pdfIn PDF document text
    • https://site-1196275.mozfiles.com/files/1196275/mufifosoverakodif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369936/normal_5fca3c7675ecd.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/gcgdMCv/crypto_sword_magic_for_klaytner.pdfIn PDF document text
    • https://site-1177566.mozfiles.com/files/1177566/middle_school_capitalization_worksheet.pdfIn PDF document text
    • https://site-1180799.mozfiles.com/files/1180799/dragon_ball_z_spanish_intro_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/kibizatududo/ejhC9p0/the_light_between_oceans_full_movie_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414334/normal_5fd6e1de962a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475730/normal_5faee3b0efc9f.pdfIn PDF document text
    • https://site-1211292.mozfiles.com/files/1211292/rejalogarot.pdfIn PDF document text
    • https://site-1177860.mozfiles.com/files/1177860/vedic_astrology_compatibility_report.pdfIn PDF document text
    • https://site-1168346.mozfiles.com/files/1168346/flying_monkey_jeans_clearance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f89e06839515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502721/normal_5fae355282e9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogurivesinoni.rf.gd/antidoto_araa_violinista.pdfIn PDF document text
    • http://lobosenus.epizy.com/musakalovefadironebezax.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD25 5308 bytes
SHA-256: 06f9e900c9ee04958ce38b970503876a6ba4520f96e9a9d727a0cdcc9e4a33db
font_01_sfnt_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 10524 bytes
SHA-256: b8fc222560bbe6c7183dd73874826f739197015f794f00d7221f91b210ce578e

Open this report in the interactive analyzer, or submit your own file for analysis.