Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bf49729a231bc2…

MALICIOUS

PDF

88.3 KB Created: 2021-03-11 19:13:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d2b47307447483eb1294127dec740fd6 SHA-1: bc5309358fe85522456d34d6ec8e82ad83c248c6 SHA-256: 05bf49729a231bc2c78b9ac1987dc2a4b2e95c854d2cd1d2ca7245fda27e9866
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://kuzutuzo.ru/wix?keyword=descargar+libro+el+dador+de+sue%25C3%25B1os+pdf PDF link annotation
    • http://umkatrade.ru/puvizjzx93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_60183db5279ec.pdfIn PDF document text
    • http://datiwufirul.medianewsonline.com/33597163281.pdfIn PDF document text
    • http://sadovik.me/tm-ac1900_modded_asus_ac68ujh5tm.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/64263500104cfg71.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/gijMJZz/two_dots_over_a_letter_in_german.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/lodabozoxizuwula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_5fd8d06d17bf2.pdfIn PDF document text
    • http://itgermany.net/tesasepi9zn2k.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jS47hOc/mabovipoviwi.pdfIn PDF document text
    • http://betmoy56.com/akkurat_mono_fontgaxl5.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/ibibpRl/real_money_casino_slots_app.pdfIn PDF document text
    • http://lolkek.xyz/crown_the_empire_the_fallout_album_download_zipehc52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_6011662ed1514.pdfIn PDF document text
    • http://dreabling.online/star_trek_the_next_generation_season_5_episode_24_castdcobm.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/equality_before_law_meaning_in_urdu.pdfIn PDF document text
    • http://urro-hu.com/31343054483i465p.pdfIn PDF document text
    • https://cdn.sqhk.co/bibolaned/eDjhjhj/goku_black_live_wallpaper_android.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/cc2b27cc-5210-468d-b8b1-c636335002c2/50356900817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc2fec7-80e8-4549-908d-0c7bd9c35ace/les_5_points_de_larchitecture_moderne_le_corbusier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c937aa99-7f07-45e9-9103-4c763710db35/tone_it_up_protein_and_greens_recipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8dbc21a-3dce-46b4-b44f-e61a5139cb6a/how_to_do_crochet_stitches_beginner.pdfIn PDF document text
    • http://pekomuvave.myartsonline.com/5099948896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb6a7c2-c2bb-4fe0-88d0-f0483d0d14af/nunaluriv.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_off000108be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BE 5672 bytes
SHA-256: f775b22aaa59d0e4926a105df9618d0843def234d324cfa2fe6441f98d389f0d
font_01_sfnt_off00011bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD5 18128 bytes
SHA-256: caef096a60cc758aa001a1fdbbb6dc3f4146631a705cc97660cf408e06f0f027

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