Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2c62a0986da693…

MALICIOUS

PDF

66.9 KB Created: 2020-12-06 19:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 74f831f0da1169baa9e80a4038ddb7d7 SHA-1: d9ac8bf6d2356efb7aa184636d40ec943766c683 SHA-256: 8f2c62a0986da693aea3e058239246f7eba33b8215b236c16ce46d359df3ffc3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://traffine.ru/strik?utm_term=dmv+subpoena+duces+tecum+form+new+york PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385613/normal_5fbf4b082a17a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f8a6488096ec.pdfIn PDF document text
    • https://xelokadidato.weebly.com/uploads/1/3/3/9/133986733/6924556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_5f9eed0888647.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/jazijavatir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5f938a35c5f9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f874b502abfc.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/napisakaluja/tojazagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b13a1b23-0039-480b-b5d5-82b1b4d3bb2d/watch_the_joker_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/91998176922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c2352a-56e0-4d92-b275-3d0ed893fc7b/16165559328.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/netovixugijokajafisuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7d8efba-8259-4f98-891c-c778b44ccc40/modesto_city_schools_tk.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/85183655087.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_off0000c79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC79E 5724 bytes
SHA-256: 72e8a997adc004dfd7c307747fd41c11ee54d116a602d801fdfa6bdf698be202
font_01_sfnt_off0000db2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2B 10576 bytes
SHA-256: 59ae3d6b38b4e4a5666ae91ea1bdde169def9989a8fdcdb31aea3ecd826e0ec4

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