Malicious PDF — malware analysis report

Static analysis result for SHA-256 baacf122a690cb40…

MALICIOUS

PDF

88.7 KB Created: 2021-07-02 08:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7bb857104476ad472f14db385021b40 SHA-1: a593e5831e243413c2c17618d199fd68664ceb4e SHA-256: baacf122a690cb401483404aa1ed9abbaf94ed4c0921752aef33accd28a684b3
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document acts as a lure, directing users to external URLs that host further malicious content, likely a phishing page or a downloader. The presence of numerous links to compromised WordPress sites and disposable hosting suggests a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=free+dat+reading+comprehension+practice+test
    • http://sl-light.ru/design/img/upload/file/nenimixot.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff920884ee---36470087776.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8819319c3---92558700942.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc17ade4122---pikotuvipanukarifojem.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4145a1e44---24525175623.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/fd813f67682b4096c9c790ef6e270563/61003867184.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac18c2674a3---18573112781.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079c108e5574---30705189745.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5279cadf67---pozudadarubamuzofezidez.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/e792705d974cbc23c49d7f29c6c21794/damamufunazunaxigexilo.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/3d4d28720dda2be998b6d1dcfb1e2f78/549276990.pdf
    • http://erictex.com/ufiles/files/4012106750.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/95066f82a0a0e90a472fb6b11ec0ae01/setotadugovodirawimamerip.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/u3kijbuvid08224of66ehem1o1/nanifotalejunajeva.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160adf28b7508d---17348656351.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ba624fa1471---delagavepo.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609da0965f6ad---dasagalujosadaz.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/7d19367b10c70fa1003f7322a44bad1a/wibokusewopuvababofu.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/f2b24e7a24283877de74e5bc135bd4e3/17170829637.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/97je9ofsa89247nq4j82iv5d85/fonovapisupusak.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/0mibckfaqimk3t2k92a25cvp26/muriwixofogobilixakila.pdf
    • http://babamoleskine.com/files/file/jujijob.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/fb4222f38deaac1cc35cdef525d9fa19/lumupireseposulezawi.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/13c4904b0aa256a454eaf05b457b04e9/xusadubuzelusinar.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160de3f68befe4---56192753312.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_off0000fa24.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA24 16792 bytes
font_01_sfnt_off00011236.bin
c48cd215550e5fa59074c5316f38d429f8428f6ad50b88527eac0d2146e14130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11236 16340 bytes
font_02_sfnt_off00013c69.bin
a739f6113248a687af8509529641fddb97af599194ac0409785b2c8c8ece57c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C69 10892 bytes

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