Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba91b6fe6176608…

MALICIOUS

PDF

91.7 KB Created: 2021-09-24 09:31:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3f0db3b313f248cf55d5869cd033e6ca SHA-1: 93f3064fbaa4f5e32e1cc306f9b815043ea71a46 SHA-256: dba91b6fe6176608cde662f5b809cfd0e96e6250487864e3d91d9a929402d5c2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The PDF contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The presence of external URIs and the overall structure suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=watch+once+upon+a+time+in+hollywood+free+online+123 PDF link annotation
    • http://asremajazi.com/uploads/files/nawepol.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/2338749535.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/kudipovitoniwewo.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/63757287961.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/kaboz.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210908_164534.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/18820766355.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/romigazezunazufodejopi.pdfIn PDF document text
    • http://khmim.com/ckfinder/userfiles/files/98264819703.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/14854786450.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/watovinulupeg.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1631934056.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/78095608759.pdfIn PDF document text
    • http://zgic.ru/!upload/files/fapopitefodafenapepuwejum.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/boligaredijovojukemovid.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/faxotexevubuninikati.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/puwusutefa.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149e9445ed01---pixafivifojejosomawib.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/juxigaxup.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/dazan.pdfIn PDF document text
    • http://ndt-ultratech.com/files/foxelepibadijolego.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132c9059275e---mowomukezolufurix.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/24036699600.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_off0000f8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11112 11352 bytes
SHA-256: 5a961ba1caa3021f97a09e26591a139bbacf509e0044b09035c1ba82cd947078
font_02_sfnt_off00012bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC0 19628 bytes
SHA-256: 6bc775370cf3a7f4b12ee15c4df9aba91a3ded01787de737d6da625244fbd331

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