Malicious PDF — malware analysis report

Static analysis result for SHA-256 70086c681daa6c09…

MALICIOUS

PDF

87.3 KB Created: 2021-07-01 00:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10340341a4217da8971bb56c9ff9583d SHA-1: e6f0792da50d6ed35425ae63d46fd31693c8ea75 SHA-256: 70086c681daa6c09b4864caccfe97748b0c2f002e805d1ce37f670035d17376f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to files hosted on compromised WordPress sites. The presence of multiple links on potentially disposable hosting and the use of UTM parameters suggest an attempt to lure users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ca40ea1b---49986041968.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cf9377f3647---20860258923.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/22a31fe2c890b5d4ad32b43dd9a7fb74/22071435111.pdf
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/47993849029.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a8053f67ec9---41842581806.pdf
    • http://bydnjl.com/userfiles/files/97566013329.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094d8abe6a84---juwolamemuku.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a20e0840c9a80fb74cba3658453b9a65/sapopetadi.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a404571ce---jidajuruketilapodelovila.pdf
    • http://rilta.net/userfiles/files/93389803949.pdf
    • http://placc.info/up_image/2858024800.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd6a49c174---52383267213.pdf
    • http://adabaskimerkezi.com/upload/file/valetimu.pdf
    • http://copy2d.com/ftp/image/file/kaluwobodip.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f39d92bea---gamasaj.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/iorp83i7ljtgk3si3k8f4kvh4m/27825866437.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/5d50b35331934bdd15cbb9a853e1b642/wumoridu.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec47415068---79794841153.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/320cb32d43f6a3202672b6ec36f6e918/51528501460.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aae5f99ec1---72460665725.pdf
    • https://cavalier-hundezucht.ch/userfiles/file/27106652275.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/08c97e536b20baed33fccadb4264af70/mapenebodexunajo.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0405157d---19338390237.pdf
    • https://neplatnasmlouva.cz/soubory/nibidinaj.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/299a4acd7d827c5b618e90bd1b9c05d1/refoxomejomujaxomezawalur.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=does+coffee+with+stevia+break+a+fast
    • 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_off0000f20b.bin
cc608af3fd89d7a9e884c8e9063eeab4ba336ba043cce3ae115a2b4e52e740be
pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 16564 bytes
font_01_sfnt_off00011d0f.bin
fb34e3d17046435670ed6204f760205fcd29047f86bab83128b1f08421448b4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0F 10668 bytes
font_02_sfnt_off000135c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x135C5 16792 bytes