Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d195476ee04183…

MALICIOUS

PDF

66.8 KB Created: 2020-12-08 08:21:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a47340c33fa3d8efbacda183208209e2 SHA-1: 6422f60c8a983cd5cd3ee96f2c09e616b5ce3592 SHA-256: a3d195476ee0418304070e82950b0bffcb55480265ba6126395f38d17b28ce57
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://trafffe.ru/123?utm_term=zoot+suit+riot+song PDF link annotation
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sakitivezilike.pdfIn PDF document text
    • https://fulitadu.weebly.com/uploads/1/3/4/8/134863398/wesusagexim_tozikizefagike.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbffcc36609fd0ee78c2f31/t/5fc137fa3c6ccf69f38a385d/1606498299577/dinamicas_para_nios_cristianos_sobre_la_amistad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b651c83-1738-434c-bb13-85bcd2499fbe/wolapixesuzabepumonira.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f5161452f90b7fe5ab7f/t/5fc578c218e72e5fdb91d61f/1606777027101/78939460523.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ae5e1c8c7413143d62f6/t/5fc540e89d7936484039873d/1606762746832/sirezadatiledale.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/futosodanujukufebomut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc788c9791da6493f6aea64/t/5fcc60606f0099009e5a4195/1607229536792/94852698927.pdfIn PDF document text
    • https://s3.amazonaws.com/gebaxovudofe/15521758185.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37b9d24b06a7eb30fb4b9/t/5fcb748166ddd570b0f5975f/1607169153696/rikigovuromafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92566107-5aaf-4fcb-a59b-83e1d51b0e62/nomebubilugofatevewof.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/barbie_suv_uk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B3 4568 bytes
SHA-256: 6311c7183004fb798fcf4581df4b5bce7bbf91b9e95922e58a63b4b9cd12129e
font_01_sfnt_off0000d853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 11792 bytes
SHA-256: 424e697cbbe870470bbb20d247425a96825537710b4d2852063b238b8c94e751

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