Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad019300cba13a3…

MALICIOUS

PDF

104.7 KB Created: 2020-11-22 09:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e550e29a3098de191e2ee87a90d89ce SHA-1: 960adf54d138a86d9046c43ccd5a6c9ed1fb2e81 SHA-256: 9ad019300cba13a30ea0ec32edc8f220178e0046ddbe9923e0c7eaa028eae019
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 0.9919

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://trafffi.ru/123?utm_term=php+number_format+no+comma PDF link annotation
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/6559727.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/favaputuxepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_5f9e5dd47c017.pdfIn PDF document text
    • https://jotitotibewava.weebly.com/uploads/1/3/1/3/131383271/rakikemoxisoxa.pdfIn PDF document text
    • https://kubinivoboduwu.weebly.com/uploads/1/3/4/6/134601548/wizejamugetunev.pdfIn PDF document text
    • https://sobegivi.weebly.com/uploads/1/3/4/3/134311910/puwibumokijupav.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/ac1e7b346f228.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/f3d6430a-8f20-4c31-8bac-ba6fc6fe00ea/pibiguz.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/van_turkey_hotel.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_off00014664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14664 5048 bytes
SHA-256: 43fd18dd69b041f9c651048ccb37536cd4eb306c51316833dc211e3ea47a4719
font_01_sfnt_off00015755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15755 15780 bytes
SHA-256: 1e2220170a759e136ba6e447c22c3bbc8e4a2b1224680893e107b2559c09f5e1
font_02_sfnt_off000186ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186AE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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