Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fb2bac48e109a5…

MALICIOUS

PDF

83.2 KB Created: 2021-05-02 19:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7f082f9d43739029a37268622446d252 SHA-1: 297efdc434d7e089bdae5be8955af6aa746674cb SHA-256: a9fb2bac48e109a5cd87d2b81533f32e67bde6b42d2d06f79090e58c4ac62b64
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=of+ships+and+the+sea+unearthed+arcana PDF link annotation
    • http://senigudalow.iblogger.org/sheet_metal_roll_hemming.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/he29Djb/tiwipitag.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/gedisufenewegukoje.pdfIn PDF document text
    • http://gijebuk.iblogger.org/67264072978.pdfIn PDF document text
    • https://cdn.sqhk.co/zidezofa/dghidif/pc_games_20219.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kubafezin/6679368369.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/pijusugabidaputebagoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/fun_poetry_writing_activities_for_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/35138610225.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/economic_development_administration_cares_act.pdfIn PDF document text
    • http://mojogoralil.onlinewebshop.net/rca_w101sa23t1_wont_turn_on.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/nidun.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/tulovitimu.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/97428731494.pdfIn PDF document text
    • http://puwepubofixa.epizy.com/24771164265.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/1160740402.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/what_is_the_best_wireless_charger_for_samsung_s9.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/frame_layout_in_android_studio_example.pdfIn PDF document text
    • http://dijinisefiregot.rf.gd/69480404635.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/how_to_price_your_pokemon_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/969528706.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF823 5012 bytes
SHA-256: 8aa44e653e0a65b5ff687dff6f1969aec54305ada4494bfabb567e99025d6304
font_01_sfnt_off0001091a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091A 11756 bytes
SHA-256: aadbea5f2df027ff8c3c48818ff6bf9287a1336477a81fb8a3f697909c853c3d
font_02_sfnt_off0001316a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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