Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4268528822593d…

MALICIOUS

PDF

96.0 KB Created: 2021-06-29 12:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ae260e5b6da8c60d4a12a6185e7c6d2 SHA-1: 64a91847f734cae92488335cdc3e91615195b71b SHA-256: 4e4268528822593d42e586bf054b87f2d193bcb4ad2912e77028b6fe5965c545
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, indicating a link farm designed to redirect users to potentially malicious content. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to obscure the final destination and potentially track user engagement with the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • 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://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a11dbb44395c210418ed1e0230472872/78019886880.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/n77uolshspp261ck58acsgo897/talinumapapav.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a16b8ea98---fowax.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fb6cef0f236f057e844432382cfabb98/80257547901.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab163747d7---75334581802.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f33e351320---xiraxojukarebudagaxuju.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dac407346---gukovebifizuvemo.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54aed92b2---kulitilag.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c883696840---mogediwigiki.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cb99aa3da---73399156696.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/5d9f0bc9da089e635993e05368953586/govibov.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a521a0f89---gusoponawe.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16081ce75eb2a2---76826700951.pdf
    • http://alumcity.ru/userfiles/file/ragiwibokupinit.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/t2cemlalc6co8vndvgcnssp0r5/82671538967.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160bad19658332---66468256233.pdf
    • http://hotelgiottotorino.com/userfiles/files/wedenufebuzabitopimar.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e35786dbd---rikivesitugudosufun.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9e6a5dff4---70600796664.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160dae61787320---setemoke.pdf
    • http://ciskmv.com/css/file/56975268600.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077be7507f01---53130348656.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5447d7b49---51789607913.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/c9c4a0bb2f78bea3dacbdb0334d229b2/5731805383.pdf
    • http://gchs1969.com/clients/867877/File/xudavowesawepivuzigax.pdf
    • http://summithigh75.com/clients/867147/File/55938186509.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=touch+typing+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_off0001150f.bin
1d74860b97f4c8f03b04a91604748584a9282d62bc7e6c58797b8d63b52ef27e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1150F 17324 bytes
font_01_sfnt_off000141da.bin
04a02d3e7996c4b655a649a27bf367847d69c4195b76958853c0e7198999c610		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141DA 10468 bytes
font_02_sfnt_off00015964.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15964 16792 bytes

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