Malicious PDF — malware analysis report

Static analysis result for SHA-256 01179a827e72198a…

MALICIOUS

PDF

81.7 KB Created: 2021-03-15 21:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c8be3209630ee70cb74c2655a9267b14 SHA-1: 917ee4b44755997b82645a51fdc27cbf9f8c6244 SHA-256: 01179a827e72198a9ad05fb02bec723a7c82e94337a70efae29b405f2fdd2d6c
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary external URI points to a URL that includes 'award' and 'worksheet pdf', indicating a lure to disguise the malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://seumenha.ru/award?keyword=days+of+the+week+and+months+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/vixukose/IvIghhi/sivasapuvidimo.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/f9845741.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/abbkYgh/adventure_maze_wildwood_nj.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/CwWhiqT/kiko_running_sushi_ingolstadt_westpark.pdfIn PDF document text
    • http://bitoxifa.sportsontheweb.net/what_lexile_should_a_3rd_grader_have.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinirumawe/hc4iahe/nigerian_music_inside_life.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480585/normal_6016c04baa74a.pdfIn PDF document text
    • https://vapasunodisina.weebly.com/uploads/1/3/0/8/130873802/7509338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497368/normal_602abcb547058.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/rizuvuvoz.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/icqic2M/chicken_invaders_3_christmas_edition_download_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/dicijjd/bmcc_portal_not_working.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/xenim.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/kivedafofelirizikel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_604a9d607f232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450353/normal_604db81d9c44b.pdfIn PDF document text
    • https://jotigigej.weebly.com/uploads/1/3/0/7/130739509/vidijemitejujaw.pdfIn PDF document text
    • https://gofubemasuxa.weebly.com/uploads/1/3/2/7/132712405/8758084.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/lirozironupomizuji.pdfIn PDF document text
    • http://talemine.getenjoyment.net/is_there_a_replacement_remote_for_roku_streaming_stick.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/who_is_responsible_for_fob_shipping_point.pdfIn PDF document text
    • http://telifujovemevo.atwebpages.com/manual_teclado_yamaha_dgx_660.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_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 5504 bytes
SHA-256: 75371a2bf250da9a32ab92d2c7019942f57ba466bbb1edc544d17017f45c197d
font_01_sfnt_off00011113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11113 11412 bytes
SHA-256: 64dbbd30ff4305bba77244169c502075707a95a8b5c8c0275e1e777e887c8d41