Malicious PDF — malware analysis report

Static analysis result for SHA-256 1776d01577974369…

MALICIOUS

PDF

75.9 KB Created: 2021-03-24 22:13:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e505f45bdf99e805fe17d81c6656c0c4 SHA-1: 1a363f6122eed73bf2efef19ae15e418396370c0 SHA-256: 1776d01577974369386ebbdf47a53f0fb3a1999203a70901285140d26e43d565
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to trick users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://golowaki.ru/award?keyword=embroidery+pattern+book+pdf PDF link annotation
    • http://risumeboze.getenjoyment.net/nipijemirekipiwivasep.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/personal_pronouns_in_spanish.pdfIn PDF document text
    • http://zimuzezu.22web.org/biochemical_engineering_and_biotechnology_handbook_atkinson.pdfIn PDF document text
    • http://lufexaxoxak.mygamesonline.org/22064063013.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/c5ghYx3/2020_ram_ram_1500_under_seat_storage_system.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/f19ijhc/xowalemoboda.pdfIn PDF document text
    • https://cdn.sqhk.co/libarazituw/YDgczgg/92072887646.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/can_you_wear_glasses_and_be_a_navy_pilot.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/igichg6/goforasotipoguju.pdfIn PDF document text
    • http://dololebajug.scienceontheweb.net/zidefep.pdfIn PDF document text
    • http://rivokalodusi.sportsontheweb.net/angai_geete_marathi.pdfIn PDF document text
    • http://lemafesopeposuz.mywebcommunity.org/tegudojaxuxonofomaxoroto.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/jaatjeh/78532276287.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/vhcj4PY/gym_flip_tyre.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kegonen.rf.gd/fajofavulo.pdfIn PDF document text
    • http://gixejemazob.myartsonline.com/perrys_chemical_engineering_handbook_6th_edition.pdfIn PDF document text
    • http://fadakivok.rf.gd/34642276132.pdfIn PDF document text
    • http://rimutapewite.rf.gd/barbie_bike_stylin_ride_game_free.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/fsi_spanish_basic_course.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/aristoteles_filosofia.pdfIn PDF document text
    • http://luxixeg.epizy.com/boxing_star_mod_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/xameno.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_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 5240 bytes
SHA-256: 1c6f79046bcf857a7e4c715897b82f0f2fa896a0c20ad4ebcd37d0ff6d65ab97
font_01_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 11124 bytes
SHA-256: 19b3126bfce4d8e852cbe75d6bdf5900368d81198feca4f48c11039f7b20d8d6

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