Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c9d104288b0b30…

MALICIOUS

PDF

85.5 KB Created: 2021-06-26 12:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64d53cd5672234415b2560e9cc049a60 SHA-1: 1071ac6b597a88b0b40ff9dffe8135d4e6d6cf24 SHA-256: 70c9d104288b0b3044766199003b035d0dbf4d5abd97d94bd117c2c8f8fac209
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of external links on compromised infrastructure suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://swadeministries.com/pastor-sammy/upload/imagecontent/file/62271816171.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/19c5bcaa4e22f70201b707f853f26bc1/sebolizovijewi.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae080daa804---xezasufoxiloku.pdf
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/zosetatilawidafuxut.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607074996dc83---fotosos.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef7fd23d19---9474578359.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/5f58b535894bbfc7efba3852e681c4a6/74562096424.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/1cd9dcc72f2d647baa5a4c52096803f0/82979112208.pdf
    • http://nitexprofi.cz/userfiles/file/84726938179.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a62bb5197---27845821036.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/xudojiwigegugowinize.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16093cef890e99---dabojositevedaxo.pdf
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607f893e5f14b---43841671709.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/d4bc977e33086c0211c93582cbdf4a31/36348561528.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/586beb0a80433bcd1743bcd3f7f50a26/fotikiwasuvel.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/bda56a380059c3499aceadd4d313af2a/52733120689.pdf
    • http://lycee-elm.org/userfiles/file/lufoguk.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f7227d63d90da93a93f3bc64648cc9d1/ganedazutudofawevutukel.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecf777d9b9---1969449365.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/6sa76o2utm9kog8e5ttcflea5c/26656585086.pdf
    • http://innotec-industrie.be/userfiles/file/zopovexesebivuxekomatajek.pdf
    • http://amuseonline.com/absite/userfiles/file/jemowidexusod.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=javascript+complete+reference+pdf+2020
    • 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_off0000eb47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 16792 bytes
font_01_sfnt_off00010359.bin
6016bee86e85a9e04b2779308f733f895639290e19773305600f0071718ba2e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10359 17320 bytes
font_02_sfnt_off00012fd0.bin
9a7ee303c9b4ba7ac0f073ef8f9e5044cb268861c218e5cc6439d2a71a77ab5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD0 11080 bytes