Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bd25190df43074…

MALICIOUS

PDF

90.8 KB Created: 2021-03-10 17:25:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4db9077ea1a2280304323c6ce9368c70 SHA-1: 51a9b0e99664eb030f89aa722e1a49ad90ac85ba SHA-256: a7bd25190df4307479df14152763206f8c0c7f6a7e6e378e8921807a95aa2429
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with the primary one being a lure for a medical treatment topic. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/award?keyword=tratamento+cirurgico+hernia+de+disco+pdf
    • http://useplafond.xyz/how_does_diversity_contribute_to_societyx7l0g.pdf
    • https://cdn.sqhk.co/rubogomuweme/igggxro/headhunters_io_mod_apk_hack.pdf
    • http://sezejawi.mypressonline.com/korg_sv-1_73-key_stage_vintage_piano.pdf
    • http://fajesamosini.sportsontheweb.net/upper_back_strain_exercises.pdf
    • http://sanatoriy-izumrudny.ru/tamagotchi_meets_fairy_guidegrj9q.pdf
    • https://cdn.sqhk.co/tibakekavero/ihd0s35/xafamesedomanu.pdf
    • https://cdn.sqhk.co/kejofuvata/mgjicgd/42589770869.pdf
    • http://byt-upak.ru/how_to_do_amazon_arbitrageo3jdz.pdf
    • http://chambre.xyz/90620904978p0rk7.pdf
    • https://cdn.sqhk.co/bemoranoz/iiiOVja/monatuxo.pdf
    • http://furniture21.online/22295330127zupl4.pdf
    • https://cdn.sqhk.co/revujinarewu/52hehgA/17621682298.pdf
    • http://899themes-demo.ru/tuvisuretogewa956yf.pdf
    • http://malanefire.sportsontheweb.net/prepositions_exercises_for_class_5.pdf
    • http://dontbeshy.xyz/jibarexugenopofuvonemabsg4q8.pdf
    • http://basvuruizleme.online/arjun_reddy_full_movie_tamilmv._ree57gv.pdf
    • http://manovina.mypressonline.com/is_after_2_a_netflix_original.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kibagog.onlinewebshop.net/akhand_jyoti_book.pdf
    • http://tiwatimab.atwebpages.com/how_to_fix_rowenta_commercial_steamer.pdf
    • http://wenares.myartsonline.com/netgear_wnr3500lv2_firmware.pdf
    • https://uploads.strikinglycdn.com/files/75f3e931-e43e-453a-b693-67c2a23c2eb4/lemaxugu.pdf
    • http://beliraguw.onlinewebshop.net/34085822655.pdf
    • http://samesesodore.onlinewebshop.net/the_heirs_episodes_recap.pdf
    • https://uploads.strikinglycdn.com/files/40b38c90-5406-4c5c-b347-de8ed2821955/geospring_water_heater_ff_code.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_off000126a2.bin
33ac4aba84ccd11c1ccb6d64e48d8e6800cee534978c18afbc12b62cb9059d8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x126A2 5488 bytes
font_01_sfnt_off0001391d.bin
90f8bee403984e923a01e49c5320108710188315e7c24624d303ff23d1f387e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1391D 10900 bytes