Malicious PDF — malware analysis report

Static analysis result for SHA-256 831b609a68679b2a…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 00:07:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e13b9a6b184082ee82bc3c5ff7c594ec SHA-1: 1298a77f397ea2944a7e705024e003d126d73389 SHA-256: 831b609a68679b2a9abbc97deeb128f5e7020164e622e948d4d6c788740d01f2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a site offering 'profitable trading strategies for forex', a common lure for financial scams. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/123?utm_term=profitable+trading+strategies+for+forex
    • https://cdn-cms.f-static.net/uploads/4379384/normal_602d845a72776.pdf
    • https://static.s123-cdn-static.com/uploads/4420906/normal_6005835e411cd.pdf
    • http://kutatit.getenjoyment.net/norcold_refrigerator_replacement_chart.pdf
    • https://cdn-cms.f-static.net/uploads/4475715/normal_6030d42fb73fb.pdf
    • http://gagimubu.mywebcommunity.org/kozamivarasubif.pdf
    • https://cdn-cms.f-static.net/uploads/4414152/normal_60370714eba61.pdf
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5fcd096e68fe2.pdf
    • http://gagivukamuw.getenjoyment.net/lamekalirumebobedagibasu.pdf
    • https://static.s123-cdn-static.com/uploads/4530868/normal_5fc80b18a753d.pdf
    • http://simopuvoramawu.mywebcommunity.org/air_fryer_recipes_healthy_dessert.pdf
    • http://sipipewawezizuf.getenjoyment.net/who_are_marginalized_communities.pdf
    • https://static.s123-cdn-static.com/uploads/4416490/normal_5fce6c44f0501.pdf
    • https://static.s123-cdn-static.com/uploads/4421336/normal_5ff195294208b.pdf
    • https://cdn-cms.f-static.net/uploads/4417408/normal_602360c982a1e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuzakifezara/96681338934.pdf
    • https://s3.amazonaws.com/kovilowab/sijevozimezuvojovenabuk.pdf
    • http://zutugidod.onlinewebshop.net/how_to_use_power_probe_iv.pdf
    • http://dokudaruriwiv.atwebpages.com/is_the_jbl_flip_5_completely_waterproof.pdf
    • https://s3.amazonaws.com/jujadodedaruxix/dipilirotumovovataz.pdf
    • http://rogofideb.onlinewebshop.net/4348457034.pdf
    • https://s3.amazonaws.com/wanasuvedigo/dumet.pdf
    • http://palelezugob.onlinewebshop.net/what_is_particle_velocity_and_wave_velocity.pdf
    • http://tulajadulixo.myartsonline.com/zotokimibas.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_off0000eaa8.bin
0a56f3e6a421514fa0eb4553e90f83ec0ba22963e29e875a747ff2deda82023b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA8 5284 bytes
font_01_sfnt_off0000fcac.bin
adccebbde672ffe98bcc2c773cbd3a086bed982fc10d21d591be0f9c49e0ef83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAC 10648 bytes

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