Malicious PDF — malware analysis report

Static analysis result for SHA-256 0faaa895c80f7e25…

MALICIOUS

PDF

90.8 KB Created: 2021-03-29 06:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a51efcd1d61415d2991bdbd5826515cb SHA-1: 27916ecdcac85bbaf2981ffbc0a4f6195a86dc8b SHA-256: 0faaa895c80f7e25a365c7e1bdd73b0b1a2bc5e13ad0cc24b6afc2e6ca441b5a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were extracted, the presence of numerous external URLs points to a likely attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

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://botokaw.ru/award?keyword=behavioral+treatment+for+adhd+pdf PDF link annotation
    • https://felezawobo.weebly.com/uploads/1/3/4/8/134896203/vomulep_ledafaketodu.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/DrxmigM/61913989376.pdfIn PDF document text
    • https://riwominejakubik.weebly.com/uploads/1/3/4/5/134598273/5610138.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/63349280222.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/suzujelinomonojesilu.pdfIn PDF document text
    • http://dimax.website/kerifob9lep.pdfIn PDF document text
    • http://sopidemeleket.mygamesonline.org/curriculum_vitae_samples_for_teachers.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • http://nikecortez.net/banadafuky49j.pdfIn PDF document text
    • http://tpdreport.com/tigubukozebegivaxesizimeljrsm4.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/O5hjjh6/coin_counter_online_uk.pdfIn PDF document text
    • http://biwonomapul.iblogger.org/mowimalo.pdfIn PDF document text
    • https://banepopewux.weebly.com/uploads/1/3/4/2/134234854/nakab-zufenulen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_7ed9fe339389483297bf839fcfc0a0b1.pdf?index=trueIn PDF document text
    • http://bumufir.rf.gd/portugus_xxi_nova_edio.pdfIn PDF document text
    • https://b5f62e6e-b620-4b0e-90dd-fa81fc7fb5c2.filesusr.com/ugd/18d815_0e920ae6e1d9484081b9959702ff9c90.pdf?index=trueIn PDF document text
    • http://wupumodo.epizy.com/70056130299.pdfIn PDF document text
    • http://jokosen.atwebpages.com/37056298583.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/relationship_between_bulk_density_particle_density_and_porosity.pdfIn PDF document text
    • https://c3e780e1-a1ee-422e-80b3-2bf79490ff1e.filesusr.com/ugd/dc7b26_d50aad2a2a5a4b7bb066b39aa23087f1.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_off00012498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12498 5212 bytes
SHA-256: 9303db97d3f35c5b82491e505aeba39835cc9dd502c254283b59c10296c3b0c6
font_01_sfnt_off00013631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13631 11268 bytes
SHA-256: 609f409e396a69d70b4bf5e581b87d81cbe334ade571a9ed129b355ed10d7542

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