Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b835bdb53c0df7…

MALICIOUS

PDF

81.0 KB Created: 2021-04-17 05:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e68ecc2737fbdac841fcbf336a2c33c4 SHA-1: 96c00e5b992d22a294eaffb7c2ffa77c032ec67e SHA-256: 78b835bdb53c0df79055f8a44c5a80c69e37e6f54db562bf6890c072373536c1
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 0.9991

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://lozipotod.ru/strik?utm_term=maze+runner+6+book+set PDF link annotation
    • http://kujinatazema.sportsontheweb.net/gojekanixeveguvevator.pdfIn PDF document text
    • http://damewonuseba.sportsontheweb.net/jurnal_antroposentrisme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409405/normal_5fd9cc16dfbbc.pdfIn PDF document text
    • http://ladekepevij.mygamesonline.org/shirt_collar_pattern.pdfIn PDF document text
    • http://danoguvu.medianewsonline.com/chinese_language_course.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/88312284941.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/public_policy_and_administration_books.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/bosch_1617_router_template_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482405/normal_600a77b6d33f2.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/basic_english_synonyms.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/60142113379.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/vizujoz.pdfIn PDF document text
    • http://rerixen.scienceontheweb.net/ascenseur_otis.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/arkitektura_e_kompjuterit_agim_cami.pdfIn PDF document text
    • http://titonevaj.22web.org/abdomen_agudo_2016.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/64546847147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_603d974eb44a9.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/sisaxu/86835374858.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/71647421661.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/pabugovusukufe.pdfIn PDF document text
    • http://zidumaxatu.epizy.com/15119479024.pdfIn PDF document text
    • http://wudafozejuniv.rf.gd/army_field_manual_definition_of_leadership.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/19003564092.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/57097179363.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_off0000fec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC3 5060 bytes
SHA-256: 34e6f8c6dc097026e0f63ffb2de6d3e31ee8f9af90e3ff089722cdb1741df711
font_01_sfnt_off0001101d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101D 11268 bytes
SHA-256: 60c68f568d82114eb1566f0860d6560c28277da7ce15e4896dffb5067bd5874e

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