Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61589ff2917f953…

MALICIOUS

PDF

72.5 KB Created: 2020-12-27 23:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9ab7be7995ea2a0652643657a067d15b SHA-1: eb9aeb8cd4148ddc2ff4ec3af6f7ba9ec81f9df1 SHA-256: d61589ff2917f9533a246eff752917d77eeebe25383281379fc19505cae3cf97
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'traffking.ru'. This heuristic, combined with the ClamAV detection and ML classifier flagging, strongly suggests a phishing or malware distribution attempt. The presence of embedded links and the nature of the heuristic firings indicate that the document is designed to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=swot+analysis+example+small+business+pdf PDF link annotation
    • https://jopovasido.weebly.com/uploads/1/3/4/6/134619877/5434777.pdfIn PDF document text
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/5251691.pdfIn PDF document text
    • https://nubojubixuxo.weebly.com/uploads/1/3/1/4/131410311/778abf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f7b48b-973d-4c69-83be-44a7e89eddd8/72317696972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ace81cb-a9f6-442e-ab98-910517c26879/keyword_everywhere_bing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b5319d-25e8-4891-81c6-75a1d8c673ff/93187523700.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/98270341305.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/a_brief_history_of_time_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1bdcca0-6d53-45da-b708-fc3bb812aeaf/lost_laboratory_of_kwalish_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ed7b917-f82b-45cc-afac-5be843ce5e4c/notusu.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/betternet_free_vpn_proxy_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1617d1-1805-4d4b-96bd-902405b07a75/48449128733.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_off0000dff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF9 5596 bytes
SHA-256: 3f78057d6462975de452ad3d2c53b03a6de4fb6c94e340e960471d15a674a82e
font_01_sfnt_off0000f308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF308 10124 bytes
SHA-256: d48aba7504078f387ad9432cce786fbf265b15c3d7d231d96ede6e62f8cbb5a5

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