Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b865eb2b757cb5a…

MALICIOUS

PDF

80.3 KB Created: 2020-12-25 01:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9198606edea05bf3e06c9324825fdb48 SHA-1: 519c26df58527229731957fb326ebbf82d2bb04c SHA-256: 2b865eb2b757cb5a608a3c97ccf3ca72777b5e875b9d021509ced14937dc98e4
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'traffking.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to other PDF documents, some of which are hosted on cloud storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/strik?utm_term=pacific+daylight+time+to+mountain+time In PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/dezemomukepaxuzo.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/jihicQS/fisaz.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/4539583.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/ZjcgcyM/at_t_prepaid_customer_service.pdfIn PDF document text
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/9664886.pdfIn PDF document text
    • https://kakakirikixego.weebly.com/uploads/1/3/4/3/134318951/7d277d34389c2.pdfIn PDF document text
    • https://cdn.sqhk.co/xejulonejo/Hggjhhe/auto_clicker_ios_download_jailbreak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/sujewa.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/67720885755.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/93221526277.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/pakebokaxurewebarom.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/zezomuwiritudeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d87305e-00f3-4fb8-9f78-25dd2f25bf9f/photographer_model_release_form.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_off0000fc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC62 5264 bytes
SHA-256: 65b6ef12288b707fe90e07dfa24f992bdd46b3b44f762d23f8c0fbe22ecbd1cf
font_01_sfnt_off00010e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E33 11016 bytes
SHA-256: d91ce4c4440bdddd077295c41ae68ad0870494dec9493db3c2fc02b62be53cf2

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