Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3773e27d3b9a405…

MALICIOUS

PDF

82.7 KB Created: 2021-01-03 04:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 613393fc47c8ae8a992f586ab85e75e1 SHA-1: 9a141a241d9e256722df9bb638599a7b1bd83bf7 SHA-256: d3773e27d3b9a405ca398c18d69949b02b4ae28d0e3bcb2c094a4bbd7f2424b4
214 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 embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, but the presence of numerous external links suggests a link farm or redirection strategy.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=wow+tbc+alchemy+guide+1-+375 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_5fbb4b9d2dacd.pdfIn PDF document text
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/654fff38ba0f09a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fbc785f00e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407062/normal_5fd630fbe5a50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_5fad67b45f174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_5fbad0eb12d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f8d4644ddb6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393022/normal_5f9d700c28a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_5f90c6d259f54.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/iKjgUjg/12770736932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450439/normal_5fe797ab0199c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469136/normal_5feb898e52edd.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/jgGMKif/39964820766.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/766f728a-14a8-4ba2-a9b3-957b25a3e02d/29347842173.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_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 5652 bytes
SHA-256: 81d1af084316a9db5ad1b6885143577b0717ec130b9c9cbd23ac8cc8e99d2482
font_01_sfnt_off00010da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA5 10016 bytes
SHA-256: 20e83f22aa7a8bd1d1b2a529d72148cf2042d55d6961950c57a04cc2e2edd868
font_02_sfnt_off00013002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13002 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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