Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b162844c5db1e0…

MALICIOUS

PDF

79.8 KB Created: 2021-02-27 10:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: aed202fe99c96a96a7b8dbf76ddf765a SHA-1: ae8220ec6ae0f1d79832be6691b85d717305656c SHA-256: d9b162844c5db1e0371a3e8cb4236e70ecaf403a52c524ce929d32a0a5d8f1b0
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, with one prominent URL suggesting a lure related to making money in stocks. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=how+to+make+money+in+stocks+getting+started+matthew+galgani+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452853/normal_5fc6852412286.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/11281313220.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/18869614939ppame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_5fe9402267635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_601e6e97a70e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382621/normal_5ff7edf022fe5.pdfIn PDF document text
    • http://yoganchik.space/how_to_make_general_questions_in_researchffrp1.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/how_to_reset_a_whirlpool_water_softener.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/F2if0ji/toruvuxejewanajiturikupaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_5fdae16500b25.pdfIn PDF document text
    • http://card2card.live/download_game_shadow_legend_stickman_revenge_mod_apk5i5zo.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/que_es_un_dispositivo_de_proceso_definicion.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/jWcxfic/crew_nation_application.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/wgeZ7if/real_gangster_vice_city_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/GpidhgW/49002120173.pdfIn PDF document text
    • http://gravkamen.ru/un_curso_de_milagros_leccion_228kgd2m.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/aULFZ2p/sculpture_garden_nj_brunch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifilow.onlinewebshop.net/crnica_de_una_muerte_anunciada_captulo_1.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/45548405077.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_off0000f821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF821 5788 bytes
SHA-256: efdfa476c0981516d220a07dda75dc40a07e3563ccebcf6f6b9fcc706a2e5805
font_01_sfnt_off00010bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC6 11080 bytes
SHA-256: 89fe627cc0b1b4daf47de02f342d333289cb827c3c64958abe5e0a5d306d30f6

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