Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef1a8a17b629f2c…

MALICIOUS

PDF

76.8 KB Created: 2021-04-22 21:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 30582c77b50225c4f6acf2a25003654a SHA-1: b6d9b5016a423fc6748c0a4c70636b4ad5151dc4 SHA-256: 0ef1a8a17b629f2cb02bca07c923a2fa181795b3f95879a92f244c3bb62c8504
134 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. Heuristics indicate it is a link farm on disposable hosting, containing multiple external URIs, one of which is `https://lozipotod.ru/strik?utm_term=how+to+use+downloaded+fonts+on+cricut+design+space`. The document body, though heavily obfuscated, contains text related to downloads and fonts, aligning with a lure. No scripts were extracted, but the PDF structure and URI findings suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://lozipotod.ru/strik?utm_term=how+to+use+downloaded+fonts+on+cricut+design+space PDF link annotation
    • https://cdn.sqhk.co/sojejinof/fhhc4hh/superhero_mods_for_minecraft.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/EgfOghh/samsung_galaxy_s7_edge_ringtone_download_mp3.pdfIn PDF document text
    • https://cdn.sqhk.co/jezaziritav/a1ifkDs/catan_universe_multiplayer_4_players.pdfIn PDF document text
    • https://nagugopusoz.weebly.com/uploads/1/3/4/6/134645600/xokut-pejemuzajutegi-gubenosawaji-zejupipesofuzo.pdfIn PDF document text
    • https://dalokagamamis.weebly.com/uploads/1/3/4/6/134695183/3f3a77aa.pdfIn PDF document text
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/223d64a3cd.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/learn_english_through_tamil_book_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/binilafobet/nmhbjf8/gangstar_vice_city_game_download.pdfIn PDF document text
    • https://veworokog.weebly.com/uploads/1/3/1/6/131606039/budugavameja.pdfIn PDF document text
    • https://pefobasor.weebly.com/uploads/1/3/4/1/134131397/670002.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/af2e648e2e66379.pdfIn PDF document text
    • https://cdn.sqhk.co/xugufufifo/igibjc0/rexapovanizolesa.pdfIn PDF document text
    • https://davovexo.weebly.com/uploads/1/3/4/3/134355956/ladad.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/tilizuwagipilalenubakire.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/j7olAMH/sas_survival_guide_app_free_download.pdfIn PDF document text
    • https://fapuwokezisojo.weebly.com/uploads/1/3/1/4/131453853/fakuxadujav.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/zulofe-xusorazavumi-sisojo.pdfIn PDF document text
    • https://cdn.sqhk.co/sokaxopoje/1gexhji/bipikoduvowezobomivule.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b9812f3-abb4-48f6-8143-0955db849bd4/dadovimi.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/audacity_usb_turntable_software_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a33ada-9252-463e-ad53-e7742490ad70/pitexolun.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_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 5376 bytes
SHA-256: 4bc0af10015f10841dc40467f6678157001d92240f7d61af7bac7534e4d799b2
font_01_sfnt_off0000ffd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD8 10512 bytes
SHA-256: b961068321c0c52ea2582d0c8b734079b89d24d24a3ad7b158183b9de44658e5