Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f4a1e1cd7fd38c…

MALICIOUS

PDF

69.7 KB Created: 2020-12-16 22:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8c3ce56ad8ee66559407d69c9ad27d3d SHA-1: 2fd6645c2e8642d2e87da14b26852d971f6acad1 SHA-256: 75f4a1e1cd7fd38cdf252f1da5bea5b945d54879e06a9ba62462f900e0498e75
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. It contains a significant number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to deceive users, potentially leading them to phishing sites or further malware.

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://trafffi.ru/strik?utm_term=douglas+freeman+high+school+alumni PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5fc5a78d6d77e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fa9c964a6873.pdfIn PDF document text
    • https://nenuxigibasus.weebly.com/uploads/1/3/4/6/134694542/virukiv_bitenuwigavuxe_sawigeginipemek_xidawuvijudafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f926f345f81c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f89fe0c0c065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_5f8e5519e1caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5f906878011fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469849/normal_5fc5d3d1bff82.pdfIn PDF document text
    • https://lotogifivetizub.weebly.com/uploads/1/3/4/3/134309957/lodaguviwo.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/jozetej/jajeran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef8c27b-3bf8-4220-a3a0-e184bd75bf92/26118632624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f222fecd-fd28-4620-9247-7e6fe6ea69c5/pokemon_silver_gameshark_codes_100_catch_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3da08f-d604-49bf-a1c7-77611cf208f1/kamoxunanulapefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49007a42-deec-4201-976c-b6f71ff267d5/what_are_the_disadvantages_of_gmaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7e2f1d-75a2-411b-beae-85bcef616c11/90811039050.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_off0000d0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E7 5292 bytes
SHA-256: 0080a4361e6125bf5448c6a8df1c7e028e162710ac22c4310ace8dcac9e6bd49
font_01_sfnt_off0000e2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CA 11616 bytes
SHA-256: 07bc95a858e1b1480f5d2e06a41c665c6d431fd0b728808a6f34acdd0af91e54

Open this report in the interactive analyzer, or submit your own file for analysis.