Malicious PDF — malware analysis report

Static analysis result for SHA-256 0078b93ac46c1895…

MALICIOUS

PDF

75.6 KB Created: 2021-09-09 18:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b1e0ce86a385bda31ff9eccddfe56c3 SHA-1: d00385a20d98143aa037cc6adae0a1df6b8fa825 SHA-256: 0078b93ac46c18956158f2a0ff098078175a48c8692404868f7c7b8b451e627f
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'. The presence of numerous external URIs, many pointing to disposable hosting, strongly suggests a link farm designed to redirect users to malicious content. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://smidgel.ru/uplcv?utm_term=syphon+filter+logan%27s+shadow+psp+iso
    • https://kme.pl/global/app/webroot/uploads/file/163045382349.pdf
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/38374801230.pdf
    • http://casavacanzesanvito.eu/userfiles/files/3109641558.pdf
    • http://energo-market.ru/sadm_files/76012353041.pdf
    • http://c-amc.com/upload/files/koded.pdf
    • http://cp-1.ru/userfiles/files/37754277064.pdf
    • http://www.oomewatersport.nl/upload/files/ruferidalurimajuxi.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f85646618e---jaxugekatog.pdf
    • http://scro.ru/pic/file/degonidunavepilewovoti.pdf
    • http://nyett.hk/uploads/news/files/92844032521.pdf
    • https://llbyggodesign.se/UserFiles/files/tafutexuvisenijuti.pdf
    • http://gemcom.org/userfiles/file/kupimifitilababuduze.pdf
    • http://touristclub.in/userfiles/file/13305143516.pdf
    • http://motolargo.pl/userfiles/file/93414039488.pdf
    • http://kbo.pl/ckfinder/userfiles/files/51351336762.pdf
    • https://soechi.id/userfiles/file/1146117768.pdf
    • http://familiegravesen.dk/ckfinder/userfiles/files/gusepo.pdf
    • http://www.centralperdana.com/file/pogevagotagatufizax.pdf
    • https://mantyobras.com/userfiles/file/68637892992.pdf
    • http://axiomestates.com/userfiles/file/66717675390.pdf
    • https://remont-bez-zabot.ru/files/file/lawuwigozoxuxuxawal.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/51oi4mt325sulndgp4v3106ra4/37069384211.pdf
    • http://msmzizkov.cz/data/dokumenty/bovevurowanijegijozobaw.pdf
    • http://dolonchem.com/upload/files/25213562855.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E0 16792 bytes
font_01_sfnt_off0000d9f2.bin
9ea2e345c438c609ea36acd3a05229876ba6ab9bfbb61f0ddd35b395ae7699fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F2 17480 bytes
font_02_sfnt_off000106c5.bin
0601e9efff2139104721f5e7dba93725bd765c789491df78fcfa223f72d06e55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 11088 bytes

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