Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b58de0804733f9…

MALICIOUS

PDF

71.1 KB Created: 2021-03-10 05:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0211a8b9df1340f6001574ea165ce6f6 SHA-1: b8cd31aabca05f260a1d8625f261251e87f6bc0e SHA-256: c9b58de0804733f9af129119d84aa84a103e11b9f9f4d242d2dea6bdf92475e1
126 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, specifically as a phishing trojan. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or redirection scheme to deliver malicious content. The document body, though heavily obfuscated, appears to be a lure related to an 'Alcatel mw40v manual pdf'. No scripts were extracted, but the presence of multiple external links and the high confidence detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/award?keyword=alcatel+mw40v+manual+pdf PDF link annotation
    • http://nefozufovi.scienceontheweb.net/ccna_200_125_free_download_2020.pdfIn PDF document text
    • https://bitokulizawefe.weebly.com/uploads/1/3/4/6/134684274/25108.pdfIn PDF document text
    • http://prodson.space/31448422421btdlt.pdfIn PDF document text
    • http://mibemuxagegija.mywebcommunity.org/vopimilagipubikegamumem.pdfIn PDF document text
    • http://hookup755.fun/tivopijobokamuguvheg9o.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/fakojuzixanaxadola.pdfIn PDF document text
    • http://storezone.info/mepikegamemapa5ra9s.pdfIn PDF document text
    • https://lusimijibujadex.weebly.com/uploads/1/3/4/6/134677052/xaridoz.pdfIn PDF document text
    • http://losinglotterynumbers.com/causas_de_trombosis_venosa_profunda_en_miembros_inferioresqj0yo.pdfIn PDF document text
    • http://luxisulejoxo.getenjoyment.net/syma_helicopter_wont_charge.pdfIn PDF document text
    • https://jivudajen.weebly.com/uploads/1/3/4/4/134470456/8452686.pdfIn PDF document text
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/mugisogozusixuka.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/emotional_first_aid_training.pdfIn PDF document text
    • https://xofebigile.weebly.com/uploads/1/3/0/7/130739964/5485477370c5c8c.pdfIn PDF document text
    • http://helplnstagram-confirm.com/208962928410nmyc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokipuzovorije.epizy.com/6695436936.pdfIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_9f39f9fd73344d90a27a6e72a1398a0b.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_b7e6bdf126f7418cb2c727006f2b65c8.pdf?index=trueIn PDF document text
    • http://jaliselisasi.rf.gd/how_to_improve_muscle_ups_crossfit.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_6193f1a468e44baeb717d8d491b53d79.pdf?index=trueIn PDF document text
    • http://pinezininefos.epizy.com/ford_555c_backhoe_engine.pdfIn PDF document text
    • http://fosadexovoz.epizy.com/12958408436.pdfIn PDF document text
    • http://penanaras.myartsonline.com/the_myth_of_sisyphus_absurdism.pdfIn PDF document text
    • http://tibepaxun.rf.gd/2083577047.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_off0000d98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98B 5396 bytes
SHA-256: 5293802984934e387ce38d91334d551814f2b839e798a9d3a36ea98861ac207d
font_01_sfnt_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 10260 bytes
SHA-256: 61814f5e6f50789e54c01aeffa56021393e3611f1c764047a7ed5e16da01c7dc

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