Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e3cca471d8a7de…

MALICIOUS

PDF

72.1 KB Created: 2021-09-12 05:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7a7b26564ad1b4f27fe0af35ddd1d2d0 SHA-1: 5edf70e3269b6c3e76f0a040bc3ea99da8184dfa SHA-256: 25e3cca471d8a7de194988f44f034305a5edc929023af0a6d8bc15fe70d8e41d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting or are structured as link farms. The presence of a URL with a 'utm_term' parameter suggests a phishing or social engineering attempt to trick users into clicking through to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oniceh.ru/uplcv?utm_term=angry+birds+2+mod+apk+unlimited+gems+and+coins PDF link annotation
    • http://nikolabartakova.cz/files/file/38312534444.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/kanipudipumobusi.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/17179fea2e36bb90302d43e0b25ce089/mexulojixejizumoriv.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/87832600630.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/31608809273.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/bulemesewogomaz.pdfIn PDF document text
    • http://starma.pl/files/file/65120276209.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/dexuzupazerinub.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/jelixit.pdfIn PDF document text
    • http://synowka.pl/galeria/file/20973774103.pdfIn PDF document text
    • http://haphadoor.com/upload/files/44156399748.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/72658353068.pdfIn PDF document text
    • http://webs123.com/userfiles/file/77125212686.pdfIn PDF document text
    • https://mcsfood.com/images/file/5615733301.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/xawebitisimesota.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/94440841151.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/potoperoxen.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/nemiduvefas.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/toxudexunijagazuziwulap.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d031981c6---62112399321.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16135af8a92108---59124224863.pdfPDF 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_off0000b5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A2 16412 bytes
SHA-256: e83477137ecb039bcf628dfa5dafdaa2cc4ae001cb49c3b3dcc0948f028a1ddd
font_01_sfnt_off0000df9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B1 11404 bytes
SHA-256: 1a0a5bf5fba7df6d61a530cc6954c2a561ae9ff05122240d03adf6a9f17f27bb

Open this report in the interactive analyzer, or submit your own file for analysis.