Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ad1ac13b9587f8…

MALICIOUS

PDF

93.4 KB Created: 2021-03-08 01:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 254ba574e56634d9fac276ca165a78a5 SHA-1: 73693160a148bedb9dbe7bb7a460ed7719f7dc38 SHA-256: 22ad1ac13b9587f895991f7805f9eeb2e0cf7ca801367d877daa0704a3164d72
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm on disposable hosting. It contains numerous external URIs, including 'http://mobeditobaxul.scienceontheweb.net/bomapabogowid.pdf', which are likely used to direct users to malicious content or phishing sites. The document body is heavily obfuscated, but the presence of external links and the PDF_SEO_LINK_FARM heuristic strongly suggest a phishing or SEO spam attack vector.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wix?keyword=reglamento+de+futbol PDF link annotation
    • http://mobeditobaxul.scienceontheweb.net/bomapabogowid.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/jyKjgR3/gakesir.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/7797959.pdfIn PDF document text
    • https://kunatelifarak.weebly.com/uploads/1/3/2/7/132712072/8073594.pdfIn PDF document text
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/foxumag.pdfIn PDF document text
    • https://cdn.sqhk.co/virixerusupa/HTI7hhV/santo_domingo_republica_dominicana_mapa.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/bOZXha7/zafarogepetizomerop.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/demigods_and_magicians_book.pdfIn PDF document text
    • https://cdn.sqhk.co/dufimogemeka/tighaje/gotoduralifipujogebules.pdfIn PDF document text
    • http://zikemipirelojo.22web.org/mufulav.pdfIn PDF document text
    • http://likododolokopaj.iblogger.org/naximozijetaku.pdfIn PDF document text
    • https://cdn.sqhk.co/kodivitedi/jjwgcjb/epic_games_fortnite_account_settings.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/c7a42c20-2b3d-49b6-926c-c15724acbd19/how_to_fix_stabilitrak_on_chevy_equinox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c0d7c0-3c0e-45ce-9127-3f4fc7880b03/8756528366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0503c0-d0db-46b9-a233-4302e5e55e95/how_to_turn_demo_mode_off_sony_bravia_tv.pdfIn PDF document text
    • http://tufexulirepa.epizy.com/72547747464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9186f47-7ab8-4952-86cf-fa8e1a95cdd5/wooden_log_table_top.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/35638318438.pdfIn PDF document text
    • http://temitiz.epizy.com/bonding_worksheet_electronegativity_and_bond_type.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88b048a-f3fa-476a-9ba9-a165936f7921/bebiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/753cb60e-e02b-4dec-95a3-62a2ef491615/3583026684.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_off00013105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13105 5100 bytes
SHA-256: e6e69ca42022df64da607286ec65450fc4bb73b627d10d95ac81e9ad872ab30b
font_01_sfnt_off0001425a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425A 11360 bytes
SHA-256: 6cddfa1644b33b661c09a19d14cc985ebd45c06cbc21588116b561ab345daf37