Malicious PDF — malware analysis report

Static analysis result for SHA-256 7301c8970799c39f…

MALICIOUS

PDF

45.7 KB Created: 2020-11-09 02:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9a25f3591850148d0b142497b15b9550 SHA-1: 9886f07b09e982f32cda8a9054dc1017df1c345f SHA-256: 7301c8970799c39f13e453068e5d28ba86c37c6514f54a7b8a85f1a867a96e12
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 1.0000

Heuristics 4

  • 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://trafffi.ru/123?keyword=pokemon+yellow+unblocked+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f93f3d029c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_5f94f4863d115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f87550743e77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5f8a2c4be3ad5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wazewezobe.files.wordpress.com/2020/11/adobe_illustrator_2019_crack_mac_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defda0da-0de1-47eb-bc4f-cea580d28c0c/33643599147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55c89c96-7a25-42be-ab8c-49b50fa9554b/nejupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0ec7c9-b886-4688-84cb-634d3c3f3c83/feviwilekagawema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d36ea80-d249-4460-a399-e2ee8680c92a/femig.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/jajowokupagawexaxezirigun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d4eb9c2-f03d-443c-92e9-406060e48f5d/petsafe_yard_and_park_dog_training_collar.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_off00007106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7106 5560 bytes
SHA-256: a066b0797b2bda485f475dbd616b570381188ed7f4ea243a333a23d7e80d056c
font_01_sfnt_off00008407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8407 11336 bytes
SHA-256: a60a032a34036d1f6654d7bc6fb1f4e3732cbd6df20c672aa8350318a75318ec