Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2d052f27d5f9e0…

MALICIOUS

PDF

62.5 KB Created: 2020-11-24 13:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 29d5bf9dd641b342f508913773ce7ff7 SHA-1: 2e31506fbb1db5d6dd0504c720c62a5708d4d378 SHA-256: 6a2d052f27d5f9e0e8f1efc7b934b5a85c24101781a022955b7fa2f621d20e09
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are to other PDFs, suggesting a link farm designed to redirect users. The primary malicious URL identified is traffking.ru, which is likely used to host or redirect to further malicious content. The presence of a PDF_SEO_LINK_FARM heuristic firing and numerous external URLs strongly indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://traffking.ru/strik?utm_term=a+harbor+seal+pup+grows+up+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f882eb880d56.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/fisirosaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489724/normal_5fb44e97762e3.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/basusefepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5f98e12728654.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5fb2cc2f2c2c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482619/normal_5fa763f1a47ed.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/74ce4f62-7eb1-4029-a567-a59e04fa1685/86882665046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c6f307-f023-4d3d-acaf-8d7adfb2de9d/juruwokazire.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/45700070563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6874c77-912b-43af-9d1b-c8aaa7e920be/1566456591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d52f02-40e7-4b11-9437-f47541bd912b/didewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7945481-92dd-4aa5-a124-2e1835f09c0c/i_want_candy_lyrics_meaning.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_off0000ad34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD34 5172 bytes
SHA-256: bfb72be9198201806ca93cf2c9e1e7c372ac7ffc5f446b4abc3a02b14dad88da
font_01_sfnt_off0000bee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE7 9512 bytes
SHA-256: 6a22d64196ffbf4ebb959142d29f9f85213bbd1491588e91f28f53fc61f9843e
font_02_sfnt_off0000df77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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