Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bf71c2ab036772…

MALICIOUS

PDF

76.2 KB Created: 2021-02-11 04:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bed8bf09d0f1d116d8bb3d14e8c05b43 SHA-1: a26b96a71924998f786991591bfaa2f95a06290e SHA-256: 60bf71c2ab03677210396c24b0e47e7f43d6bd13b6d77aeb506ffe5e74880377
134 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The document uses a fake invoice lure to entice users to click on embedded URLs, which are hosted on disposable domains. The presence of external URIs and a link farm structure suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/123?utm_term=rain+gutter+machine+rental PDF link annotation
    • http://kellys.space/majesty_yp_250_manualyamdb.pdfIn PDF document text
    • http://zugezufamuluki.iblogger.org/vobosa.pdfIn PDF document text
    • http://liwuzagesasa.22web.org/79384407247.pdfIn PDF document text
    • https://toxosujaduwo.weebly.com/uploads/1/3/0/8/130874389/bumapukeka.pdfIn PDF document text
    • http://carishr.com/temporary_line_marking_paint_for_grassp1mvi.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/7f9d8d928.pdfIn PDF document text
    • http://helplnstagram-confirm.com/write_acknowledgement_for_geography_projectplav6.pdfIn PDF document text
    • https://dokerawu.weebly.com/uploads/1/3/4/3/134313580/c3259c30.pdfIn PDF document text
    • https://kadefevexenikoz.weebly.com/uploads/1/3/0/8/130813118/mevegikiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/nigigeje/dhfihhb/pelifusosarum.pdfIn PDF document text
    • http://helplnstagramoffice.com/chessington_dr_land_o_lakeslhpb1.pdfIn PDF document text
    • https://wupupuredizuso.weebly.com/uploads/1/3/4/8/134894828/lelogefa_gonusimerasane_zinopukobakezuv_rurozema.pdfIn PDF document text
    • https://cdn.sqhk.co/datisafapuv/ePgeKhj/69358942216.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajipesexadagon.epizy.com/puwewibori.pdfIn PDF document text
    • http://savefativiluz.epizy.com/42948462540.pdfIn PDF document text
    • http://wubalele.rf.gd/passport_application_form_word_file.pdfIn PDF document text
    • http://sudiwoke.epizy.com/android_adjustpan_hides_toolbar.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_off0000ebfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFE 5040 bytes
SHA-256: 6a124426fa87a07f853617c38582aebe81e190a6480c18c5753c3133fa6124cc
font_01_sfnt_off0000fd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 11312 bytes
SHA-256: b805ce124bcd03eb2c3a5b3e9b735f74b00ad61df39ee2de3a2bb2260c49db6e

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