Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25649389d747792…

MALICIOUS

PDF

73.0 KB Created: 2020-12-02 16:04:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 663c462bd2a58d9303a62b1bd26f8bd8 SHA-1: d5547d7c85e2de82d284c4355769fa7af6abd9b9 SHA-256: c25649389d74779246cb28fb10ede14b4f2ae22e480bf05ecb023194299b32c9
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 0.9997

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://trafftec.ru/123?utm_term=series+7+flashcards+pdf PDF link annotation
    • https://momogomuwe.weebly.com/uploads/1/3/4/8/134885938/gasufa-tumuvopo-tavim.pdfIn PDF document text
    • https://kiligazifozu.weebly.com/uploads/1/3/4/5/134506598/3ea4d.pdfIn PDF document text
    • https://lepebixetuvenal.weebly.com/uploads/1/3/4/6/134634058/096bb8cb.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/2991129.pdfIn PDF document text
    • https://kavovukabej.weebly.com/uploads/1/3/4/6/134621515/xemezosijidota_pobolafotiwe.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/4700990.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/1a922458-7a9d-4b2d-aa7b-ed47d57d1ffd/zunozakujiwuzerenosenebu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf5e3eaf37e3b64614d0c/1606284772362/jekipalanexejas.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/77053882193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83982e4d-3f27-449c-b564-76d09f6a65be/xamuseximamab.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/agar.io_hacks_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/febodo.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/bosezamunifojipomanowadu.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_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 5428 bytes
SHA-256: 642a62f0b61bfb3f8861dfa07591f175032cee56e1bf7e772f60bca9d32286ca
font_01_sfnt_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 11528 bytes
SHA-256: 785633dfd805135539dade267b709dd709d74d34412d6d71ea5fd01a5e6a8ea7

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