Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43a7bb3503b211e…

MALICIOUS

PDF

75.2 KB Created: 2021-03-23 01:28:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ccbfe2a7eedaf5e28c3207b414b031bf SHA-1: 78bbaacf1bfaeb5d8e06da0e21127589664bfcc0 SHA-256: d43a7bb3503b211e7e5f9b67d849ad4fc5a6f5e7866b9f86e5ce7bd839a066b1
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 an external URI pointing to 'baarspo.ru', which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, references 'Konica minolta c224e admin password', suggesting a pretext for the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/aws?utm_term=konica+minolta+c224e+admin+password PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490001/normal_6053522819aaf.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/daSijhj/ice_rage_hockey_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/xarazoxege/sVl9Kge/50960084348.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/Mvjcmie/lepixitubejoxara.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/izhdhdn/arcade_shooters_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/ggdgeid/parallel_worlds_parallel_lives_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/jcogjhc/notepad_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/IusTbja/skater_aesthetic_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/Vhejj0a/candy_jump_game_v2_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/DLgjhfc/mivowupivadisofakurepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_60585c00320c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_605513d459508.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/cNjjhjB/free_download_3d_live_wallpapers_for_laptop.pdfIn PDF document text
    • http://ehaberdevlet.com/898494163282sen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527345/normal_5fc7c5591c0c8.pdfIn PDF document text
    • http://ihsteam.ru/cvc_words_printable_worksheetsvui3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493282/normal_5fd0b440d25e5.pdfIn PDF document text
    • http://tuzazigigub.iblogger.org/access_vba_form_borderstyle.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xazoviwupudowol.rf.gd/jaxosavil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe3c494-55eb-4d2d-9ca9-a9e06428a73a/offline_english_to_bengali_dictionary_free_download_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c37c171-d9eb-4ff9-bfe0-eb4be7dd19a0/bazafuxawuwexiketoxepo.pdfIn PDF document text
    • http://xuwuxubemepimox.rf.gd/aace_statin_guidelines.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_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 5500 bytes
SHA-256: b280788e1d73cf13eb0c3a75799113939a7b2e67915e9d9b96f5da9789e2cd9a
font_01_sfnt_off0000fac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 10852 bytes
SHA-256: 652a86a16dcf1f7a76067286fe2b260a9c20188b30bfe7414e02fb89d0f06688

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