Malicious PDF — malware analysis report

Static analysis result for SHA-256 9413e6127823b1d3…

MALICIOUS

PDF

82.1 KB Created: 2021-03-06 05:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2bd859484ca533e99c3195bd1c2a58b8 SHA-1: 90fa60fd865095ac7f60bce3125b5c0341aa6ac8 SHA-256: 9413e6127823b1d3e95963d66f7cdff22bee57304be6e28c8312206364411dfd
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/award?keyword=what+are+the+4+types+of+textures+in+music PDF link annotation
    • https://xibimitavidin.weebly.com/uploads/1/3/1/8/131871740/luwopik.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/egja3er/stachys_byzantina_silky_fleece.pdfIn PDF document text
    • http://probkin34.xyz/how_to_use_a_paperwhite_kindle4sao8.pdfIn PDF document text
    • https://zuwojutiraz.weebly.com/uploads/1/3/4/7/134729165/39b94cd6.pdfIn PDF document text
    • http://frankkyko.com/luke_bryan_one_margarita_release_datebv1fr.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/ijahi0F/49850230152.pdfIn PDF document text
    • http://ketosimple.online/984057789347w1ix.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/ihcihjn/77951135515.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/6020909.pdfIn PDF document text
    • http://pycnidwzxc.info/1080036258526uxs.pdfIn PDF document text
    • https://mavosawiki.weebly.com/uploads/1/3/1/1/131163846/woletinipupepukekes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/91e39db6-7973-4c54-bea5-e14c193ad5bd/starfinder_near_space_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ddc2d0b-e9c0-49b0-8142-730d9d031e47/refekesidobabiwufepiraz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d038049-0514-4d4b-8fca-0d3ef74268ac/the_firm_nas_az_foxy_brown.pdfIn PDF document text
    • http://wozunajovufati.rf.gd/android_activity_xml_file.pdfIn PDF document text
    • http://xowuxojugo.rf.gd/jawbone_up_app_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f745b4b-fcf0-4fb1-92e4-1b7aaadf9a13/living_in_balance_facilitator_guide.pdfIn PDF document text
    • http://fukokikedusej.epizy.com/59276263926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e982da34-2c0e-4a71-abdc-06c856136a06/81604582380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae296ec-5855-4cb4-a341-e02cc21b2a30/roxejakupitavepuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6279982-ee6c-42b3-a1b8-564d562ef19a/stihl_backpack_blower_br600_best_price.pdfIn PDF document text
    • http://bikukasosisado.epizy.com/lurozojowetototasobadepub.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F0 5376 bytes
SHA-256: 4ae62a5c59f2b343be6ac02282c38515714f6b73da344848039e0cc8d7ab1abf
font_01_sfnt_off00010a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A29 10152 bytes
SHA-256: 79fd80c5e532a0bf22182f0ca8a36ff488f3883be34f958b3ab9def86bb31315
font_02_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2