Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0d99ef22c740d6…

MALICIOUS

PDF

110.0 KB Created: 2021-06-26 04:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1fa31ed716fad50a56824be7f1eafd9 SHA-1: 0987f426565727aa4003c19dc307dc774810242d SHA-256: df0d99ef22c740d6b418c8dd1e70fced968e4081375c250ac2c2fe4568ec9114
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites, and a critical heuristic identifies it as a lure for a password-protected archive. This suggests the document is designed to trick the user into downloading a concealed payload, likely for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9666

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d658e4df67---65073825625.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160891fef2ffcc---21408717919.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fd0314c6b---xitaralog.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/qkk2n2c96t4gff7ji6ttokvjuc/96118009022.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a55eae7953---39996060559.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/aa6bgrf4quvon73b4vebsq5lkb/vidajun.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/mubofonutivorebax.pdf
    • http://albino-pitti.com/pub_img/file/43723635563.pdf
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/909c64791470fe81b13f77468c975985/risomomotajomanaxodevan.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cabda9689---gaporaz.pdf
    • https://stvorki.ru/files/file/8524517329.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/7b2b2be50dfddb070d0a2c91abf81555/41564192437.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/8fd78b0df870d74fe4f712c0f2c18656/janakedimanotokexomezorev.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/bbe5h2npricfglji12cf1sr407/37257415467.pdf
    • https://ncsccalgary.com/userfiles/files/30592991693.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/09ddf46a2edbc863d1de067852c0a41a/zekotiraro.pdf
    • http://aaaexpressheating.com/userfiles/file/lixudunug.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609de4fee382c---33527048913.pdf
    • http://taxicityplus.ru/userfiles/file/958332182.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/f79ce0b21e2cfa8daad5579538aec1be/9119747295.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3c5732873---7054500148.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080f4f281705---betifesigis.pdf
    • http://decom.pro/admin/ckfinder/userfiles/files/11537240643.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59d826133d---93016501094.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/p8q136m4j8am8iuufcmrp52fm2/makoxoti.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16079041090ab4---dumilepexu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=dispute+meaning+in+arabic
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000129d0.bin
39d697a5c46c2989897a06640fbf733e03fdedbbb7d458234714032e4941deba		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x129D0 32104 bytes
font_00_sfnt_off000111bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111BF 16792 bytes
font_02_sfnt_off00016287.bin
83cb43fae27469866ad2f76958fd5cdbc540e1c1ef5fb46718b0cf9eb1ed3be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16287 18328 bytes
font_03_sfnt_off000190ac.bin
79824b7e86e2e4ace5d42537e4e30cc03d3adcac3388d986649d543ccf1e37b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x190AC 10792 bytes

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