Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8884a7a54b1863f…

MALICIOUS

PDF

70.8 KB Created: 2021-04-02 00:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 62a65c02ffec76997b17365ffb041aa5 SHA-1: 68eeda9290a256e6a5e51cdc648a45c1af3f86d3 SHA-256: f8884a7a54b1863f7fe4c723bbdcc6e9dc548ed11db3a72ac7102f5ea1ef9744
166 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic strongly suggests the document is designed to trick users into believing they need a password to access an archive, a common tactic to bypass security filters. The presence of external URIs, such as https://nipisod.ru/award?keyword=breaking+the+law+guitar+tab+pdf, further supports the likelihood of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nipisod.ru/award?keyword=breaking+the+law+guitar+tab+pdf PDF link annotation
    • http://rivepozepuxar.mywebcommunity.org/les_accents_en_franais_exercices.pdfIn PDF document text
    • http://vugivanasidej.22web.org/crack_sat_math.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/technical_aptitude_questions_with_answers_for_electrical_engineers.pdfIn PDF document text
    • http://miwuzobi.sportsontheweb.net/related_studies_about_cosmetics.pdfIn PDF document text
    • http://sasegotib.medianewsonline.com/xaniledixasavozane.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/toguvaju/criminal_case_mod_apk_2._29.pdfIn PDF document text
    • http://kupikobu.epizy.com/az_cardinals_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0a0e03-7bfd-45bc-9a08-a03d7a522a84/palifodedukevanagis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7345b1-4b95-4a0c-bb53-6505ffa9fcaf/52205245866.pdfIn PDF document text
    • http://mezajuwobit.rf.gd/10028265450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff4fc43-8dda-4adf-81f5-e7b370ef552d/tuvoligimumupogexasid.pdfIn PDF document text
    • http://virojokezof.rf.gd/nigadeduvipexu.pdfIn PDF document text
    • http://wazinupizut.epizy.com/7817872656.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/sizumosezitulum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5ec43e-28b1-410a-b71f-b73b44f56fbe/81049498959.pdfIn PDF document text
    • http://repoxiwaxatasa.epizy.com/biogeography_lecture_notes.pdfIn PDF document text
    • http://navadolaje.rf.gd/hashar_ishq_da_video_song.pdfIn PDF document text
    • http://zetafilutebes.rf.gd/clangers_sheet_music.pdfIn PDF document text
    • http://sadamalaju.epizy.com/jaxiguvasanebiximijunatud.pdfIn PDF document text
    • http://birevave.rf.gd/japan_calendar_2020_holidays.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/85800129241.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/define_formless_synonym.pdfIn PDF document text
    • http://vuvevuzipag.rf.gd/algorithms_to_live_by.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_off0000d746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD746 5468 bytes
SHA-256: 97ff5755ca30e256708fe6d1463340a530f35e81f35afd448e6fc11162520a11
font_01_sfnt_off0000e9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F0 10636 bytes
SHA-256: 4a5542fadbbb7ddf4e0f42c88efec0bd802bacf826c2c7033ae71b7a8dbbb342

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