Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df36d8480a5d51e…

MALICIOUS

PDF

63.0 KB Created: 2021-02-18 22:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0a449a160b233904b104098a0ebbeebe SHA-1: 3d1878ce3f4b884e27124fa4c630a03284a29679 SHA-256: 4df36d8480a5d51ea6ec1ca0ea2ecaa95be82eacb741ce95340cb4f0854a05ee
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links to various domains, many of which are hosted on disposable or low-reputation platforms, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9813

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/strik?utm_term=what+is+the+best+dog+collar+for+obedience+training PDF link annotation
    • http://mebel-albero.ru/fluturi_de_irina_binder_downloadvoz7v.pdfIn PDF document text
    • https://powipopes.weebly.com/uploads/1/3/1/4/131406611/8472523.pdfIn PDF document text
    • http://my-favshopf.online/8764669908440zeo.pdfIn PDF document text
    • http://magic-spring.com/nadiwalupadaruzogowizew47pvb.pdfIn PDF document text
    • https://nuranisemamev.weebly.com/uploads/1/3/5/3/135324344/1e483c.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/farepetedinag.pdfIn PDF document text
    • https://vubanuta.weebly.com/uploads/1/3/5/3/135348855/vagalokimi-binemin-fopiferuwa.pdfIn PDF document text
    • http://dektesheff.xyz/similar_triangles_missing_sides_worksheet_answer_keyh0wa2.pdfIn PDF document text
    • https://jotipipadazazo.weebly.com/uploads/1/3/4/3/134319758/gukuves.pdfIn PDF document text
    • https://zibakuponitek.weebly.com/uploads/1/3/5/3/135303957/zobukugut.pdfIn PDF document text
    • http://vkcc.xyz/tukufunaxerozefamivubuwfbw.pdfIn PDF document text
    • https://ritosameb.weebly.com/uploads/1/3/4/2/134266106/diliwowafilumapinak.pdfIn PDF document text
    • https://rumodabumuxe.weebly.com/uploads/1/3/1/8/131857513/wirevokeziwepit_judeki_wunute.pdfIn PDF document text
    • http://shimano-stradic.ru/wagulavoparunadolejebamea0ojo.pdfIn PDF document text
    • http://normaa-id.com/nidir2i4za.pdfIn PDF document text
    • https://durirumis.weebly.com/uploads/1/3/3/9/133999752/8dc42d51d44.pdfIn PDF document text
    • https://fawewetipe.weebly.com/uploads/1/3/1/3/131379545/5628816.pdfIn PDF document text
    • http://fartook.online/fufarepopefokowigom19sid.pdfIn PDF document text
    • http://123dutch.com/camscanner_similar_apps_for_android352p9.pdfIn PDF document text
    • http://woduzubede.epizy.com/ms_drivers_license_permit.pdfIn PDF document text
    • http://nonidimujosapa.epizy.com/metagupaka.pdfIn PDF document text
    • http://jalasofumikom.rf.gd/zumipajoxetojekafiputol.pdfIn PDF document text
    • http://vetuvadoxawiton.epizy.com/nopegafin.pdfIn PDF document text

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