Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6fd19d3a198c32…

MALICIOUS

PDF

82.8 KB Created: 2021-09-16 04:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 20d14120ce1563be785acdba071e9bce SHA-1: 5d8ee9951e74968790874b6605a511930b536cc1 SHA-256: 0e6fd19d3a198c3202e72d13f04b402135781629ca8053555c76b7ecd9cb2c3e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The file contains numerous external URIs, many of which are hosted on disposable domains and appear to form a link farm, a common tactic for phishing or distributing further malware. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=the+little+prince+full+pdf PDF link annotation
    • http://hfengly.dk/skoleportalen/userfiles/file/zeriwinimuzopulusi.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/tupulojajemivafej.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/jemeva.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/83597085643.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/kelajexejavepiririkanufot.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/xagap.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7a109496b---74953501259.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/40543408409.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/47604891972.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb58f0c80068d5f99471e90dd56120c9/41148627094.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/dubesabejisexosotaterip.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/xibafotefarijusogeno.pdfIn PDF document text
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/59352309135.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/vupinezatogenuju.pdfIn PDF document text
    • http://vit-physio.de/file/wozirupovinewaderifuzi.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/bimosinirisokajo.pdfIn PDF document text
    • http://amandamaitland.com/images/file/28185840460.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/noxisilaripaga.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/6109117118.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/97426805945.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/54173266987.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C5 17984 bytes
SHA-256: df42c556320300da0a589f2f060fd95ae63c6da632014d8b34b92acaebcd1664
font_02_sfnt_off00012643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12643 10328 bytes
SHA-256: 608d897a9d7d86c856e7739a4ac6e64fe13a9cb2d1232e330bbdc55477457860

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