Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e747e42a7e020c…

MALICIOUS

PDF

78.2 KB Created: 2021-02-28 19:30:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3929612b95e1af06a34bcd2104a405be SHA-1: e182f46d8d5b34a57a914e39173cc7e765caeae9 SHA-256: e9e747e42a7e020c73c52513d1b2f2cb3457a736ff00e3b7543f4f0a2c9d8c94
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://jumiwimov.ru/strik?utm_term=bersa+thunder+9mm+ultra+compact+review PDF link annotation
    • https://cdn.sqhk.co/tezizejaropu/Hifhhjb/tomiwekazapeka.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/zipitineza.pdfIn PDF document text
    • https://zewalomoweso.weebly.com/uploads/1/3/4/5/134588134/5ca51e.pdfIn PDF document text
    • http://fepotarugagi.22web.org/activator_windows_10_enterprise.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/iaidzic/zombie_warrior_5e.pdfIn PDF document text
    • http://endi-itali.space/strawberry_09_word_cookies_special_levelaaopq.pdfIn PDF document text
    • https://lokulubebu.weebly.com/uploads/1/3/1/8/131856352/jiwinuz.pdfIn PDF document text
    • https://cdn.sqhk.co/vigefifobot/gjegdVd/zinolobave.pdfIn PDF document text
    • http://cenderaoriginator.com/2001_polaris_sportsman_400_carb_rebuild_kitdy99f.pdfIn PDF document text
    • http://vikubemaba.22web.org/divutif.pdfIn PDF document text
    • https://godivibodo.weebly.com/uploads/1/3/4/0/134040440/6835958.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/benuxivobin_xolotu_fifawamukajegu_mowerenure.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/kGhbXWL/44163824938.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sinojerazofot.rf.gd/samsung_nx300_price_philippines.pdfIn PDF document text
    • http://woxepakaj.epizy.com/bleacher_report_live_aew.pdfIn PDF document text
    • http://babematalal.epizy.com/kumaweloxipedaxitifak.pdfIn PDF document text
    • http://vunonam.atwebpages.com/78089324314.pdfIn PDF document text
    • http://tamuluworab.rf.gd/5183621976.pdfIn PDF document text
    • http://nexiwamuwi.rf.gd/fotixusuregidimori.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_off0000f1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DA 5672 bytes
SHA-256: b9a2b18c638197aebe5d6ce83116965a6bcec587aca0a0dec7742ed5d3bc9bbf
font_01_sfnt_off00010507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 11088 bytes
SHA-256: 0d4d7a58e182df7ebe13c1301756fde5ae0d5306799da4ae1334ad8b474b1862

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