Malicious PDF — malware analysis report

Static analysis result for SHA-256 13dd22592486c90d…

MALICIOUS

PDF

120.1 KB Created: 2021-03-13 13:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45ddabf99973a27321f6f1ac1bcf4ae4 SHA-1: 544b64406c941fa1f8873b46181dc3dbd1d1b678 SHA-256: 13dd22592486c90d783703f42814a4e085d39021b7bd3b4d0bea771fb050c756
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9999

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://resalured.ru/strik?utm_term=wd+tv+live+streaming+media+player+manual PDF link annotation
    • http://testrun.ru/espresso_shot_nutrition_informationkylqh.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/95576402915.pdfIn PDF document text
    • http://spiritstudio.ru/hp_laserjet_p1606dn_printer_resetlrx47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479906/normal_60493a802dc13.pdfIn PDF document text
    • http://virivuluk.getenjoyment.net/42476224129.pdfIn PDF document text
    • http://mazanatur.space/5661538194d98mo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5fd26a8cc341b.pdfIn PDF document text
    • http://podarokinsta24.online/tosekaxumtns.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/21638975351.pdfIn PDF document text
    • http://depegiwisa.epizy.com/aduro_hybrid_h1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/mage_the_awakening_spell_list.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/types_of_language_in_nepal.pdfIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_f10e24f462ee49c1a59709e6981288e5.pdf?index=trueIn PDF document text
    • http://sarupuxev.epizy.com/rebefijemor.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_319a34fbbbfe442fa746b21b57f932f3.pdf?index=trueIn 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_off00018cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CCA 5456 bytes
SHA-256: d8eb697660997a629dbdef910a76d58866b9a300067e1407c4a830e89e6feff5
font_01_sfnt_off00019f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F53 16072 bytes
SHA-256: 137bdbe777845d8723583c83e7bc258cc15c2a467d02506a60794b3da2809f4d

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