Malicious PDF — malware analysis report

Static analysis result for SHA-256 09adb80327f468cd…

MALICIOUS

PDF

71.9 KB Created: 2020-12-23 16:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c95f805128940336db908d082c4ce434 SHA-1: e316ff0baaac4abf14a6efbbfe05b831d8243377 SHA-256: 09adb80327f468cda14c3d77a2b69fdf70535b1715c2462a1239d87259f891ea
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://trafftec.ru/aws?utm_term=oxford+collocation+dictionary+free++for+pc', appears to be a lure for search engine traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafftec.ru/aws?utm_term=oxford+collocation+dictionary+free++for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480187/normal_5fcea02fdf968.pdfIn PDF document text
    • https://donikigegetala.weebly.com/uploads/1/3/4/3/134311768/pokuroberurujarunu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463824/normal_5fcbf8c63695f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478383/normal_5faf94242fe87.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/DVOZajj/undeniable_meaning_in_punjabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_5fa00b202b334.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393180/normal_5fc6b54592593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8ad236a1afe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464869/normal_5fdeeb232c6d3.pdfIn PDF document text
    • https://lewixixidofuj.weebly.com/uploads/1/3/4/3/134393564/7711636296723ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446772/normal_5fca614c3ce55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409806/normal_5fc3fb3663d84.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/tiluwisulepam/nuzojefogote.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/woh_apna_sa_full_episodes_ditto_tv.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_off0000d979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD979 5168 bytes
SHA-256: 7103f1f0dea36adccdd13d1326a3d18f293265d585a0d236683b7bba58076965
font_01_sfnt_off0000eb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 11456 bytes
SHA-256: d446dfea26a453b6650bdd5240772c6c854cf7b30f9ce8f09e2cefb9a4ff6d19

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