Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7121d7d392745bf…

MALICIOUS

PDF

66.6 KB Created: 2020-12-20 10:31:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ad324183d071cb43f7030ac985d34e54 SHA-1: f74f70210d2c74c2562deb6872bc2c353e7f1bb8 SHA-256: d7121d7d392745bf9f03e0379ceafa42d70fe600f81f725a4aee1cec5e18128d
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of phishing or malware distribution. The document body is heavily obfuscated and does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/square?utm_term=economic+systems+guided+reading+activity In PDF document text
    • https://cdn-cms.f-static.net/uploads/4477173/normal_5fbee55956f14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_5f95f8bf1415a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5f9f936211abf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f953fa7ba4ba.pdfIn PDF document text
    • https://tijisevivojo.weebly.com/uploads/1/3/4/5/134502531/supolo-refagasuta-nafusip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466364/normal_5fb5f8aa27b9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408190/normal_5f955986d4f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_5fd399c1cc673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_5fba923103767.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/57581dc8-ef10-4e1b-aa1a-3a757e239d4d/64014444430.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfda27a5bc066edf9fc50f/t/5fc18f9a2dd96f59182a5370/1606520735258/71755264834.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0c2eec0a1d2b4e57c466/1606224942775/wekig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7697dbc-cc88-4c69-8f9b-54f596880f61/33653146745.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_off0000c823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC823 5344 bytes
SHA-256: f8a6dc6fac2c3ff6e397f3f8fe34644f47d8046ebd7bc081fd9dd4c66df03488
font_01_sfnt_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 10212 bytes
SHA-256: 6ed2d629b9accedcf5bc154e81d5b5af15b38c354ffb8521bbbb99ca7ebe1e90

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