Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08bcd60f282248b…

MALICIOUS

PDF

84.4 KB Created: 2021-07-14 05:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4aaff68def609244cb221cb49a205f29 SHA-1: 6bf32f62bd7c654470b2e48c7dc1b5c7f5f730c2 SHA-256: f08bcd60f282248baa546e0af8219258a0ee8dadc494b88879ff7519c84da6e1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to compromised websites or phishing pages. The presence of multiple links hosted on potentially disposable or compromised domains indicates a likely attempt to distribute malware or harvest credentials.

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 https://drafthe.ru/uplcv?utm_term=effects+of+arteriosclerosis
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f5e26a37e---5281546716.pdf
    • https://juniorclublivorno.com/sitonews/images_upload/files/13622505674.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f5dda191a---dobofodekumef.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/5cdb68504524ad4166a32a1d8e6e5100/voteno.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d626a3deefe---detumifexomomofatowemeriw.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bce1fadbafa---56784806359.pdf
    • http://arslanemlak.come/file/fofapu.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16078ec49e9f29---dedugebitilojako.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/48782100739.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095dd8ad1e18---xozimavenoma.pdf
    • http://sns.hu/_user/file/48205589107.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/m4lv4bcrg5lelp9bv92foj5ves/71329192242.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/726qf5vf23kf82v349hurpu5pb/22245161741.pdf
    • https://tckontrola.hr/files/98075685632.pdf
    • http://nprofit.hk/userfiles/xerazevolufagujotezikudo.pdf
    • http://animationcoach.com/userfiles/file/3421146661.pdf
    • http://prosquash.by/data/tijomi.pdf
    • https://mikludava.lt/images/files/jalijon.pdf
    • http://wallawallahighschool1968.org/clients/75819/File/gogowosekebuzu.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/0460300c1c4567220c60d23ef5182ac4/jekeboma.pdf
    • https://bamor.org/userfiles/file/kenefaranedawosaju.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/88ec247d1ca229b610784463bbba00e7/lajekegavomokakisanekixu.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_off0000ea1a.bin
50c684f8d62733644c7761e18117ed52c3d140c72f5b94730e45e2f82f93d02a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 16684 bytes
font_01_sfnt_off0001156d.bin
20181588c09b4555687723fe401eff9875cc576b28b781179fc94fec9af7b85d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1156D 10208 bytes
font_02_sfnt_off00012c73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C73 16792 bytes