Malicious PDF — malware analysis report

Static analysis result for SHA-256 2348f87b5214b907…

MALICIOUS

PDF

71.9 KB Created: 2021-03-21 08:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f92b4723d2672e388ba16f88ac436dcd SHA-1: 1c73057b4cb67910782c96f341e09e4113707213 SHA-256: 2348f87b5214b9074a5638bf01ae810143f7828a24ab2eb8869be0a092df5aae
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, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'golowaki.ru', which is likely used to host a phishing page or deliver a second-stage payload. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=lawrence+county+probation+ironton+ohio PDF link annotation
    • https://cdn.sqhk.co/zimuteraf/jbOfgek/gabanusuzupenezarararil.pdfIn PDF document text
    • http://tejafosiko.iblogger.org/22646656082.pdfIn PDF document text
    • http://fimewovoko.getenjoyment.net/questoes_enem_analise_combinatoria.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/hgjhe5p/dead_zone_action_tps_apk_pure.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/hfgchgP/learn_to_play_texas_holdem_poker_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/Wfngdgi/adosphere_1.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/medical_certificate_form_4.pdfIn PDF document text
    • http://kerosijuvibeg.scienceontheweb.net/fukesimi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bugotavuvogeko.rf.gd/labijimuborikumujigaw.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/golden_sun_dark_dawn_djinn_class_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/how_to_unclog_an_oreck_xl_vacuum.pdfIn PDF document text
    • http://lugimeviguv.myartsonline.com/cactus_y_suculentas.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/what_causes_your_dashboard_lights_to_flicker.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/pujur.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/56191438914.pdfIn PDF document text
    • http://numotuvafoja.epizy.com/roland_td-30kv_price_philippines.pdfIn PDF document text
    • http://kajufikuxididon.rf.gd/jafunolubikogaketibune.pdfIn PDF document text
    • http://kolegigogar.rf.gd/american_heart_association_cpr_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/gisum.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_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 5088 bytes
SHA-256: 006a2cd485696136c4b313796cc71f338646153e92472685a3c1c7f182f62f89
font_01_sfnt_off0000ef33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF33 10284 bytes
SHA-256: 9776f80d339dadfd88c8d2b248fc711d6e7a4d09a62532411790d12d11275e55

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