Malicious PDF — malware analysis report

Static analysis result for SHA-256 df28b2885b35e193…

MALICIOUS

PDF

75.1 KB Created: 2021-01-04 01:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: bd475da6020168b29ef06d21287e0612 SHA-1: 285ccd21f784dea35d9a683a3887483ee23d7bde SHA-256: df28b2885b35e193092a1bbda1eeb2e97364ba86eebfa29f08baf192babef6e5
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, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. No scripts were extracted, but the primary attack vector appears to be the embedded URLs acting as lures.

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/aws?utm_term=long+time+ago+aaron+copland+sheet+music PDF link annotation
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/sumejomewakezam_nikegigiwor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5fe2f93db3485.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393625/normal_5fee84a1538ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451555/normal_5fcef8bd2325b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_5f987262519fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_5fcf1199711c3.pdfIn PDF document text
    • https://kofusozefo.weebly.com/uploads/1/3/4/5/134515267/a1729.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/iigejgw/arrow_going_up_and_down.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417205/normal_5fe4e701cf43f.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/2d0841b4-3341-4406-9f15-546712336cfc/8485748466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03910044-b897-4818-afa9-ad9245af4db9/delta_vfd_troubleshooting.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21B 5428 bytes
SHA-256: 063e948556f3511048afb0090d1617b53c48221ab173f7ab05caabdf11b7f771
font_01_sfnt_off0000e464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE464 11068 bytes
SHA-256: 0f13fa51c6453c890363802e9e1d43c54d42ada92194f2e11b10842ab245f3d5
font_02_sfnt_off00010a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1B 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208

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