Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca30f5138ce87bf…

MALICIOUS

PDF

195.1 KB Created: 2021-03-15 06:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 73488e200af71db32ec38c079b408f9f SHA-1: 2e972f0dc8f780e08604b25664eced34b9c8375e SHA-256: 0ca30f5138ce87bfc52a778060d5e81d301077402efea7d3a8bbb2f5050f9ffb
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ponafet.ru/wix?keyword=warmane+hunter+guide+pvp PDF link annotation
    • https://tulosiwawi.weebly.com/uploads/1/3/5/3/135326734/4105530.pdfIn PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/V8jhOhc/hide_and_seek_lyrics_meaning_howard_jones.pdfIn PDF document text
    • https://pupadidaf.weebly.com/uploads/1/3/0/8/130873798/dusafazipuneniku.pdfIn PDF document text
    • https://cdn.sqhk.co/vigefifobot/DAECDgh/worujorekoli.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/icidgeH/mega_win_casino_free_slots.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/jehj2rx/32469897729.pdfIn PDF document text
    • https://badosesidexezub.weebly.com/uploads/1/3/0/8/130874160/421347.pdfIn PDF document text
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/0f6198730edf2f0.pdfIn PDF document text
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/a66867330a96c.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/grwjij6/music_player_app_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/5djehgn/neloloxapotamirakugi.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/jea3ihh/66848008511.pdfIn PDF document text
    • https://reravojune.weebly.com/uploads/1/3/1/4/131406269/2340307.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/cidNEgh/rewavewil.pdfIn PDF document text
    • https://kobafanosige.weebly.com/uploads/1/3/4/0/134016660/7a88038adb03.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/V6xicNs/nick_robinson_bbc_height.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/XDifEjb/bearded_butcher_knife_set.pdfIn PDF document text
    • https://cdn.sqhk.co/fosigigamef/NhfLjdq/jotinusuw.pdfIn PDF document text
    • https://cdn.sqhk.co/xolokenuw/gf9hfjh/sukusixabosemuxofisap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zurovajij/any_video_recorder.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/vuvar.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/reglas_de_acentuacin_en_espaol_rae.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/8592967180.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_off0002c3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C3B4 5236 bytes
SHA-256: ade1c1357956003db0bc7b7c2badd37bdd0b02febd7a353d450c26cdf1aafddd
font_01_sfnt_off0002d56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D56A 11700 bytes
SHA-256: 46de8aa751a5980a022147c71f78a3fb2724944484fc3fe0b13b492aa1a8f1af

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