Malicious PDF — malware analysis report

Static analysis result for SHA-256 46342596ab0acf06…

MALICIOUS

PDF

113.9 KB Created: 2021-09-20 15:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 31c882ed65dae4d4c19ca6ca91f708dd SHA-1: 9aa8d91a354e7549118dec6c3e03b5025fe78d29 SHA-256: 46342596ab0acf0607dee9d35bc99015470c5607b8909f716ac9a1aa50bb9688
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating a potential for malicious activity. It also features a high number of external URIs pointing to various domains, suggesting a link farm or phishing infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://paykaaluminiya.ru/ckfinder/userfiles/files/xigezar.pdf In PDF document text
    • http://aftckwt.com/uploads/file/livaxutiravu.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/naxibijakugetolikabute.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/13795924881.pdfIn PDF document text
    • http://saaretravel.ee/images/file/faxumalebujefamosorex.pdfIn PDF document text
    • https://jjpremiers.com/files/rifovujidezizujulizawa.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/zamanoxukotevenuwamef.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/mifojivilinuw.pdfIn PDF document text
    • https://samuelben-horin.com/userfiles/file/12075101964.pdfIn PDF document text
    • http://imi.vc/upload/files/joromugekezinududuve.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/rozeregatujalerekalu.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/mukaza.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/fuxabenokokowazijuzufu.pdfIn PDF document text
    • https://ultralloy.net/upload/files/wugagatulegoxumog.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/40227031999.pdfIn PDF document text
    • http://rdasesores.gestconcursal.com/editor/ckfinder/userfiles/files/vesatalaro.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/gegeligib.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/29522552113.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/lujejetokosakefisulaz.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/72131305875.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/savoporaka.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/kaxizub.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/31633575821.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=woody+of+now+you+see+mePDF link annotation
    • 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_off00015676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E88 20060 bytes
SHA-256: ee37e4f71f324d7d7944060b4900701eb92a231b801c1d8eea00a308209029bd
font_02_sfnt_off0001a2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2B3 10308 bytes
SHA-256: cf8504ddee3b0bccd1a3e9e725f838138dbccf0538e76f70978d67440f70baac

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