Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d16b351f75544b…

MALICIOUS

PDF

78.4 KB Created: 2021-04-27 18:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1d2a591ef824df3e66ec2487b7efed9d SHA-1: e958f33d54125c3ae0ad22bdb6f4aaf195920e21 SHA-256: 00d16b351f75544b6ccedbd773eab17c81d5a5e1d01dae286730ed3a41596975
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/strik?utm_term=2010+ktm+450+exc+owner%2527s+manual PDF link annotation
    • http://joriwolujuf.sportsontheweb.net/astro_del_ciel_testo_italiano.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/jggdjfz/fiwemofagogimilanovo.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/rakaviwogowi.pdfIn PDF document text
    • http://repair-planshetov.ru/safety_engineering_notesrezir.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/d8ihQOK/mevakijelujedabamur.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/nNjchgi/12971453438.pdfIn PDF document text
    • https://cdn.sqhk.co/xegapanasa/JS1gdhj/rozitimalowupataxowuwabe.pdfIn PDF document text
    • http://film123watch.com/how_to_make_screen_smaller_on_mace8my0.pdfIn PDF document text
    • https://cdn.sqhk.co/luvuxokam/gbUoyha/dual_universe_release_date_xbox.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/99104699321.pdfIn PDF document text
    • http://igbusinessabouthelp.com/jupejumulabosejuld5gxz.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/ibjaYje/catfish_cooley_tampon_story_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/hiWhbdC/bike_wallpaper_hd_download_for_android_mobile.pdfIn PDF document text
    • http://milky-rp.space/6354037491pk0ji.pdfIn PDF document text
    • http://arnautmebel.ru/zbigniew_brzezinski_the_grand_chessboarduehql.pdfIn PDF document text
    • http://lifelalulenomip.mygamesonline.org/bugaboo_cameleon_3_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/mezewimaxus/avgjCje/90043726572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_4e02981bf5b84fa4901176812ecf30b7.pdf?index=trueIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_2c8c4f2cd2a74c6696d6805038e1f276.pdf?index=trueIn PDF document text
    • http://taroveruwidiba.onlinewebshop.net/il_cantico_delle_creature_testo.pdfIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_9302bf45d12b4b158fd0ce995b4aab81.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97f702ca-7d7f-4abb-b2ff-fabccc3bee6c/theory_of_justice_brief_summary_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64da00dd-4241-4d7d-8883-747f4b31b084/ikea_bed_frame_queen_parts.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_off0000f3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 5648 bytes
SHA-256: 70522d58045e7fe638acf4504ab0d9d34fd844db99c2a7aacb27ada6bc708c20
font_01_sfnt_off00010753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10753 10820 bytes
SHA-256: 858b9e3c604723a366435dd53d218990663d76c9f5f3cbf90d510b8ee2ee8905