Malicious PDF — malware analysis report

Static analysis result for SHA-256 d218f4fc4a003968…

MALICIOUS

PDF

82.6 KB Created: 2020-11-18 21:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8a0bc16245dd6dd93d6130aa2f172b9d SHA-1: 524c87ff6f01b56e0227303e83ae487a1fd03a24 SHA-256: d218f4fc4a003968690a211b6e2ed4e71c8494a7d69b486ac49e0aa8c28d6f8e
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO spamming operation. The primary URL, 'https://trafficel.ru/123?utm_term=rivers+of+africa+by+length', is likely part of this scheme to drive traffic. While no scripts were explicitly extracted, the PDF structure and the heuristic firings indicate malicious intent, likely related to phishing or malware distribution via the linked content.

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://trafficel.ru/123?utm_term=rivers+of+africa+by+length PDF link annotation
    • https://rejigebejone.weebly.com/uploads/1/3/4/4/134462336/9755627.pdfIn PDF document text
    • https://pivubetipu.weebly.com/uploads/1/3/4/3/134328131/4431801.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/xuwafewesevit.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/turip/kajonijataxavotifajiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d585bf-29c0-46de-819d-2a6e51f9d3bc/languages_of_eberron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f36160f-dcd4-4630-b4b6-d7f9c74e975f/jipadiki.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/gastroparesis_diet_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/gene_linkage_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef43ba40-9d0d-43ad-ae11-e93703763535/8282867208.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/wotakiwefawefif.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/first_automotive_warranty_1800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588a57dc-83f7-423c-b552-b55d62931312/75261291665.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_off000105f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F9 5452 bytes
SHA-256: 4fd89dc9db7097490cbc7e73d50b4a26500f1c088efb1e01e7271ecdba42b997
font_01_sfnt_off00011893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11893 10824 bytes
SHA-256: 38446a5926b64e258480fc4e20280887e370871d6c58dc09e05e01ccc2fc24b4

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