Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b7b1f9936c9fd3…

MALICIOUS

PDF

96.0 KB Created: 2021-03-19 05:34:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33057affbaca2ac9ae35a1182a6b0fca SHA-1: 435534f3e8507278ca7c615ce1664c08635aea55 SHA-256: 49b7b1f9936c9fd387ecf60cf4c547350dbdc3dd5a086a6883c563a6a6f6388a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or scam page. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the document content suggest an attempt to trick the user into visiting a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/award?keyword=edital+concurso+prf+pdf
    • https://cdn.sqhk.co/vasozaponem/ygihR4C/adhe_kangal_movie_free_in_tamilrockers.pdf
    • http://arboozfilm.com/4099588889qqr2i.pdf
    • https://kusumuwuwudes.weebly.com/uploads/1/3/4/3/134338751/jilixirofalini-boxubeso-fedozugigapo-webakuwa.pdf
    • https://cdn.sqhk.co/xemugugafot/aJghjg4/pejijijububibokixuputaz.pdf
    • https://sujozomamuv.weebly.com/uploads/1/3/2/6/132681492/zokejo_bofelap_xipulutolidomap.pdf
    • http://nekidifuton.medianewsonline.com/elder_scrolls_online_character_creation_simulator.pdf
    • https://cdn.sqhk.co/lixejudazeza/hVdjeie/37438433792.pdf
    • https://sivipafegedijog.weebly.com/uploads/1/3/4/4/134443607/dobinot.pdf
    • http://nakekizedexu.getenjoyment.net/health_and_physical_education_book_class_9.pdf
    • https://cdn.sqhk.co/revinoxu/ihhiijb/89914465222.pdf
    • https://wububored.weebly.com/uploads/1/3/4/0/134042895/6f3d6cc.pdf
    • http://kprovk.xyz/55948642284stfl3.pdf
    • https://cdn-cms.f-static.net/uploads/4470540/normal_60314b969c59b.pdf
    • http://maewallace.com/hello_starshine_fontitxcl.pdf
    • http://kokulotasuz.mygamesonline.org/92958122570.pdf
    • https://cdn-cms.f-static.net/uploads/4446289/normal_6031dcc325cdb.pdf
    • https://cdn-cms.f-static.net/uploads/4500895/normal_5fda74782a33c.pdf
    • http://sq11mini.com/13633787254yflv5.pdf
    • https://cdn-cms.f-static.net/uploads/4417414/normal_60399e5ee7e5f.pdf
    • http://kevebofuru.medianewsonline.com/6909100569.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tojuzogip.myartsonline.com/blues_chord_progressions.pdf
    • http://lebusepuwiri.atwebpages.com/41219541444.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001304d.bin
8e1db241cb31cdce0a2d7535d1d96ab4e45793c8713ce97ca8fe6080690fe60f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1304D 5108 bytes
font_01_sfnt_off000141bc.bin
00de52fa6b7fb40fb204910c212757e0783383da93b8cc907b4e650a95134c4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x141BC 16140 bytes