Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a103b73bdc00dc…

MALICIOUS

PDF

92.2 KB Created: 2021-05-08 20:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 646f558b71907d381da7d5e55e57c1e4 SHA-1: 0331dd9def23e567896fb2dfea3a13a94e45b61c SHA-256: e6a103b73bdc00dc51ffbe6af574613b67ab4e2e03619357680fe6948531215c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous external links, characteristic of a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, with the document body suggesting a lure related to 'The Prince' by Machiavelli. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support the conclusion that this document is part of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://botokaw.ru/strik?utm_term=resumen+libro+el+principe+de+maquiavelo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404750/normal_603cb1d749203.pdfIn PDF document text
    • https://fifofisepag.weebly.com/uploads/1/3/5/9/135985139/f873b5ecbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_6011ecf10753e.pdfIn PDF document text
    • https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/dudetutuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/mjdM6hi/35129608548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476445/normal_6011834698651.pdfIn PDF document text
    • http://tofogabe.iblogger.org/sas_proc_logistic_ods_output_example.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/sXhf4ig/dojukef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_6011a9d0288b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420612/normal_606333c789eaf.pdfIn PDF document text
    • https://gozowejikagigu.weebly.com/uploads/1/3/5/3/135345496/adbff5f.pdfIn PDF document text
    • http://gifazat.iblogger.org/64755803636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6035c05be196f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_60330085f27ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388178/normal_5fc8362535b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_6044d98217cfe.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/WiS7Eja/special_olympics_2020_winter_games_volunteer.pdfIn PDF document text
    • https://dojenamolusojow.weebly.com/uploads/1/3/4/8/134868247/nizegonat-jemutire-winafonoluzuwed.pdfIn PDF document text
    • https://xogevowizixid.weebly.com/uploads/1/3/0/9/130969953/2befa.pdfIn PDF document text
    • http://zipogagu.iblogger.org/balearia_denia_formentera_50_euros.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44b9565-0900-4c51-9122-dbfef7b4b94d/metro_north_station_bronxville_ny.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3217c0a-f576-42de-881d-02d47930f1d0/dujofixumibewotibotoz.pdfIn PDF document text
    • http://biwodonugawodil.rf.gd/android_objectanimator_scalex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2cd4fc3-313f-49e3-9b55-f58880d4b495/christian_life_bookstore.pdfIn PDF document text
    • http://sudogirelokuf.epizy.com/suits_season_8_episode_10.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_off00012989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12989 5636 bytes
SHA-256: b7b95ed8dd8c6bf25ace1a77e091df6e315def055ed83247f67c052f2630a83c
font_01_sfnt_off00013c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9C 11480 bytes
SHA-256: a9201dd345e00a8b4a9b5f659032fd6f09cd27607a3c82568c94aa86ba3fbc6f

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