Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e84ca8ef05efbc8…

MALICIOUS

PDF

76.7 KB Created: 2021-03-29 09:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b1a6dfa062ab8ecdca83dc347572e419 SHA-1: aa34914474118833ed38bf72d5c26e32e400aa99 SHA-256: 2e84ca8ef05efbc8965cbc4a0b0a212e8e6bb9e9b2c83fa51e8c2af5bf720a75
174 Risk Score

Malware Insights

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

The PDF document is detected as malicious by ML classifiers and ClamAV, and contains numerous external URIs pointing to disposable hosting. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of command execution tokens within the document text, suggesting an attempt to execute commands or scripts. The presence of multiple URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://fokemale.ru/123?utm_term=allan+gray+orbis+foundation+fellowship+application+form PDF link annotation
    • https://cdn.sqhk.co/leporolino/d0BcMds/super_bomberman_4_rom_english.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/zivebes.pdfIn macro / runtime command snippet
    • http://sipivide.iblogger.org/41251519090.pdfIn macro / runtime command snippet
    • http://technodom11.com/presonus_studiolive_16.0_2_dimensionsha677.pdfIn PDF document text
    • http://vimoroketoburiv.22web.org/40644263724.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/fda9a8813.pdfIn PDF document text
    • http://velixone.66ghz.com/python_format_sscanf.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/9oMnjdr/50139501632.pdfIn PDF document text
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/vilemadas-jijijijoxorokak.pdfIn PDF document text
    • https://mozibidu.weebly.com/uploads/1/3/4/7/134763316/7169718.pdfIn PDF document text
    • http://fc-aromat.ru/what_are_the_5_principles_of_natural_selection12ajs.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/jb4ghgd/94024440809.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/6192745.pdfIn PDF document text
    • https://s3.amazonawsIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/18179508775.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/56813252544.pdfIn PDF document text
    • http://vowanufino.rf.gd/viduzavotezewaterafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b11a08a-558c-4365-b71f-11d862e0505b/according_to_the_elaboration_likelihood_model_of_persuasion.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/best_website_for_booking_hotels_in_bali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d2a7f3-a4f9-4848-af62-179cb7b6df07/mounting_sunsetter_awnings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27352b58-45e5-431f-be47-25017c0204ca/around_the_world_in_80_days_characters_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/87688309078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15d39e9-e560-48e9-afa1-1f01afae8590/boxezitigaraxorotasu.pdfIn PDF document text
    • http://palulofegag.rf.gd/the_amber_spyglass_review.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_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 5892 bytes
SHA-256: c82cd2e2f06e69d7389eb44b0eff82bfb3cdf483c81430d053719baed42c5bc7
font_01_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 11048 bytes
SHA-256: 341eeea51c5d62f85ebeeb27589fa1bef9e3f94f68610c060c60d97bb9ad8741