Malicious PDF — malware analysis report

Static analysis result for SHA-256 04810e4f0369d224…

MALICIOUS

PDF

69.4 KB Created: 2020-11-19 19:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: dd3e5a86d46e11574bd5b3327525a0bd SHA-1: 1d04f2526f3e362a92dce2677fcf2d701c005317 SHA-256: 04810e4f0369d224d110a6008bd22239795ae58cc9133881a14e3bc237df562c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://trafficel.ru/123?utm_term=guild+master+s+guide+to+ravnica+pdf+portugues', is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=guild+master+s+guide+to+ravnica+pdf+portugues PDF link annotation
    • https://sudiseva.weebly.com/uploads/1/3/4/4/134470115/2bd57a1a83e9c5.pdfIn PDF document text
    • https://rewazuxaroro.weebly.com/uploads/1/3/4/3/134341361/6406877.pdfIn PDF document text
    • https://pobasejedewepiz.weebly.com/uploads/1/3/4/0/134017346/temireneg-gopok.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/a11de13c-099d-422f-ae0d-999e1e3c0c80/ranger_s_apprentice_book_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675392d9-4cd1-4b3d-91e3-06762cb31bcc/pesibesanuwotaxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/xuleni.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/musafejoguvo.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/vupuxorolobi.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/zumajesobigiwig.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/daemon_machina_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a4d723-c9d0-429f-bc43-2bf0b1afffab/36255451696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dabc0e85-94bd-4884-b8a1-b093366d1dc0/diary_of_a_wimpy_kid_old_school_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gonuxiwela/cabin_fever_2_spring_fever_2009.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/35343069248.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/77512003617.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADA 5564 bytes
SHA-256: a5d6d7fa6d70afd3d12079a63f1a64478853db13d7f0a88cae5f10ba3e00801e
font_01_sfnt_off0000cdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBA 11092 bytes
SHA-256: 6fb122f8e988ac1d679e61542dbc8a196415b0a795d93ce5b860006819a345e7
font_02_sfnt_off0000f30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 16232 bytes
SHA-256: e1fcaa290bc8b5aed85f312864440120c61db6abd2add9737883d56687aaee62

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