Malicious PDF — malware analysis report

Static analysis result for SHA-256 346e7cb8c35be79e…

MALICIOUS

PDF

74.3 KB Created: 2020-12-27 15:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d03e44f076ef387773ede101f8b271c3 SHA-1: b6fc4d6b447611afedc13d8a47280ef6107f3e98 SHA-256: 346e7cb8c35be79e42e6bdffba576f76ce25bf385c8d4889199ad5230a4f0621
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a game ('terraria') which is likely used as a lure. The presence of numerous external PDF links suggests a link farm or redirection scheme designed to lead users to malicious sites.

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
  • 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://ggtraff.ru/123?utm_term=how+to+get+the+guide+to+respawn+in+terraria In PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/fimijikubow.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/45adc894d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5fbc387f3d492.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/7cfbae539d2c372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408463/normal_5fc997c1bd184.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/b8fab072-d8b4-4ac9-849e-06fd86449dbb/pesugizav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e24c3d59-9c1c-494c-94fa-bc70120e2f26/pathways_1_listening_speaking_and_critical_thinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db61d3e1-9302-4f13-94ca-e7dbdddad51f/mcpe_tellraw_command_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6539e17c-7cfe-49e6-a692-24b539be8bc0/tagideb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7124ec7-d3de-4c85-978a-c5bf1b03b2f8/53052816897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/700e55f0-cc26-48e3-aea1-fa81bf5629d0/zaluvolufara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8096f44d-8508-491b-a8f8-4e4d73a4d285/gene_pitney_songs_list.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_off0000e419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE419 5244 bytes
SHA-256: 1dd35faf3e2b2ea3030a7b887869eedb5c5fb2cb059a08882a3b3f8e34a04ea6
font_01_sfnt_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 11608 bytes
SHA-256: 3a6490754bcee44b2df84f1c982fb9d0e0e66381f8161bd1e606a918669f3de9

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