Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64e6c30680a696f…

MALICIOUS

PDF

71.5 KB Created: 2021-03-30 04:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fbe6239dbc8acaaf329c589ae0702253 SHA-1: edd0d61ba04d3c0058062897d2608c3acacffb1e SHA-256: d64e6c30680a696f6c33cb1a2f0b19d97aa8f0b51fd289dee20e2889351a0801
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 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.
  • 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/award?keyword=free+a+line+skirt+pattern+pdf PDF link annotation
    • https://cdn.sqhk.co/tigixexaxi/dgiSqOc/84022143837.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/importance_of_assessment_in_special_needs_education.pdfIn PDF document text
    • http://savadaqwe.space/craftsman_garage_door_opener_replacement_remote_controlhfx7z.pdfIn PDF document text
    • https://sopunarexij.weebly.com/uploads/1/3/1/8/131857112/rimubamirekisak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_5fd9f76fdea4c.pdfIn PDF document text
    • http://tuimag.ru/6709239090071i8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453885/normal_6051d0325845a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488130/normal_5fed14cc5f3aa.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/eUprgjE/potabelidetibekaru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_600de208538ff.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/chemical_engineering_technical_interview_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/retakabif/fNgiha1/significado_de_palabra_buzzer.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/QhiiaY1/23921714668.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/hhQgf9O/joxaker.pdfIn PDF document text
    • https://toxerixefekivi.weebly.com/uploads/1/3/5/2/135296371/woboturudoj_nerikibibev_goratajokateke.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/icHOljL/72791407859.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiforeru.atwebpages.com/mastercam_x5_lathe_tutorial.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/pes_manual_usmc_2018.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/problemas_resueltos_cadenas_de_markov.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_off0000d966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD966 5056 bytes
SHA-256: cacbbf9dd82f3b37ad15db4b01a3354412fc59855ea2f7149058289accdf6197
font_01_sfnt_off0000eaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 11336 bytes
SHA-256: 9dc3c99873d693eb3d541c6e86ed774afcf266bdb350d760b0e468917dd69730

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