Malicious PDF — malware analysis report

Static analysis result for SHA-256 08567db60f1bb5e9…

MALICIOUS

PDF

87.8 KB Created: 2021-07-02 11:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bdd74c68b4aee19241b931b8ae67d5f1 SHA-1: 6039760a7316660c2f03ccc9936914bc269b622c SHA-256: 08567db60f1bb5e94612525d577cefff4882e471d01c4cc26f75f8c67f152bd6
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting. These links likely serve to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://traffictkt.com/viking1/uploads/files/musakonipozalus.pdf In PDF document text
    • http://bobiniauto.com/userfiles/file/75827646599.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1a398eeb2---bixofojijasutefigewopupil.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/5631516857.pdfIn PDF document text
    • http://starke.ca/clients/84205/File/90947614599.pdfIn PDF document text
    • http://novichiha.ru/pic/file/71190963642.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9acf20e48---26521128535.pdfIn PDF document text
    • https://didacostruzioni.it/userfiles/file/63273051838.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160db9da2ac1ae---jafevefidulupotew.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/53540163479.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/66262337a6d8a43650a2e29792f086fb/18849930537.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/a3eb48aab50e5d2750690a50dffe7327/dukefuxebe.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/fe88026e77cdbff37356c43f0bbd40ae/mukiwokewibagun.pdfIn PDF document text
    • https://oxi-dental.ro/imagini_ws/33172858153.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfcd4d3443---koverawuvunotavifagox.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/vuget.pdfIn PDF document text
    • https://daismene.it/file/baneromidodu.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/62427147305.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/8chj792vhudrpkmnein0965hnk/valusagadenolamid.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/fmv7lsl2uisdi77j20s7censp5/velokifuvasuz.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/b4a9797213fad9c04401f80e7395d69f/3695085743.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/1b2ab96fe65db6bcdb5e4f423c25f634/36644946037.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/01cb95f7c46da643b276c700d02f0e62/6222848253.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c2def5a273a---relixadezufowojonefada.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/wibiteterakuvobutik.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/9c9c544cc1a9ded47b7f8dc9608506e1/lufuvakexemugelol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=gfr+and+agePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 10044 bytes
SHA-256: 1ff51a7a7d83c0c2e829426b5f9e412a5e3c34a3ee0a7096cbe31143c20b7d8d
font_01_sfnt_off00010bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C8 17808 bytes
SHA-256: 704147290f7c9b3e9c4b06a4faeda757224e937cf803628aba995640d0b59d54