Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e107051b4f0cfb…

MALICIOUS

PDF

77.3 KB Created: 2021-03-28 15:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acfee718bd8e2856f27c4672205bab3e SHA-1: b285783fdb4bd9b2c331d31091150116ed05fedc SHA-256: b8e107051b4f0cfb55e87651f200671df4e5d62f7fc6fa0ed56a31af07bdb7b2
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, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to a technical query, suggesting a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/strik?utm_term=lg+306g+tracfone+factory+reset+code
    • https://static.s123-cdn-static.com/uploads/4417413/normal_5fcd7d2c391b8.pdf
    • https://static.s123-cdn-static.com/uploads/4423137/normal_5fcf82a5c405c.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • http://goproits.com/degawibiwalaxokavarebozezxb1r.pdf
    • https://cdn-cms.f-static.net/uploads/4369926/normal_604913548ccfe.pdf
    • http://rexevivejegox.scienceontheweb.net/mewumegonukopomem.pdf
    • http://digosige.mywebcommunity.org/maths_calculus_formulas.pdf
    • http://kufomabid.mywebcommunity.org/nefropatia_diabetica_tratamiento_nutricional.pdf
    • http://excellent-spb.ru/set_opacity_of_background_image_android4hv14.pdf
    • http://mazipuvaxa.mywebcommunity.org/solajemejolakikomexuteki.pdf
    • http://jubigale.scienceontheweb.net/poxepisetu.pdf
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5fe39f5e5bcae.pdf
    • http://vijofudevadotar.mywebcommunity.org/cancer_de_pancreas_endocrino_y_exocrino.pdf
    • http://mesanezedid.mypressonline.com/melesamudezirugarafum.pdf
    • http://gomijexa.mywebcommunity.org/60132995197.pdf
    • http://davupopebuwiser.sportsontheweb.net/jim_wendler_5-3-1_workout_spreadsheet.pdf
    • http://mojofaza.mypressonline.com/newazixege.pdf
    • http://jenewazajasazu.getenjoyment.net/national_rail_pocket_timetable.pdf
    • http://samettemiz.xyz/los_fundamentos_del_voley_resumencykog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://viwuwijagabote.myartsonline.com/zipatorajuwez.pdf
    • https://uploads.strikinglycdn.com/files/82f59dd7-faeb-42a3-ab22-60f3d58f5c3d/does_fedex_store_have_notary.pdf
    • https://uploads.strikinglycdn.com/files/2117bba4-cc76-4f43-9ffc-59932e3127f6/the_fox_and_the_crow_story_questions_and_answers.pdf
    • http://novogizeboje.myartsonline.com/2045859526.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df30.bin
7c92de846d1994947cc8bf1d3b562fc32b5c25335dfd592f7bbbdc3fb3677aa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 5400 bytes
font_01_sfnt_off0000f18b.bin
739be11fb63c95e1873ba882d06d204682091d78747d2118e9e0e32b624650d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 11944 bytes
font_02_sfnt_off000119b4.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119B4 4324 bytes

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