Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2325d3f6ed875c…

MALICIOUS

PDF

194.4 KB Created: 2021-03-15 20:53:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7ad86fd55bd50878bd947cd153772747 SHA-1: cb9049fdb4fdac839d1482fb3fa0f442f591322e SHA-256: 2e2325d3f6ed875c6c32e41bc4e2fb292a82fc4b3780de411f100e053f5760e9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains a large number of embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/123?utm_term=chrysler+sebring+2010+manual PDF link annotation
    • https://cdn.sqhk.co/busumodofu/xHjjJii/46797231854.pdfIn PDF document text
    • http://dududuw.mypressonline.com/riwupajuguro.pdfIn PDF document text
    • http://copyright-supporthelp.com/singer_confidence_quilter_tension_problemsha2ed.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/30673112870.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/kebenufofuruz.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/market_risk_management_book.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/hbaYchd/75174371830.pdfIn PDF document text
    • https://cdn.sqhk.co/tadeketoxab/jbjjdig/neon_rider_world_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/KgjcgeK/somilovotisota.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/SftpfFm/worst_battle_of_american_civil_war.pdfIn PDF document text
    • http://save50.pro/77032577717dtcoa.pdfIn PDF document text
    • http://nepatokada.mypressonline.com/86254678389.pdfIn PDF document text
    • http://didazema.mypressonline.com/butedalatirasinilebekab.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/1gc1gjj/dream_girlfriend_jp_wiki.pdfIn PDF document text
    • http://fobixoleji.22web.org/tewisekunasobuzif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vafikozokus.rf.gd/28011695581.pdfIn PDF document text
    • http://woxikajir.myartsonline.com/xopivanimupevaletatujewa.pdfIn PDF document text
    • http://vonodese.epizy.com/beteb.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A87C 5572 bytes
SHA-256: d6d0dcc31dcce787df26f9cfda20f0bb9f0138e6d7e177abcb7fca67ed8f06f0
font_01_sfnt_off0002bb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB4A 12344 bytes
SHA-256: 2b4788871038f933e3ce2868298b89f3b2ae06c672cd1cafca7683d911d53e32
font_02_sfnt_off0002e585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E585 16084 bytes
SHA-256: 7851fffef52e473cda661ca30cfe3df526f3fed1248a67fb10825064e0e4480f

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