Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0676bff98f6d5a9…

MALICIOUS

PDF

86.4 KB Created: 2021-07-17 05:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 043d5020848e4fdbb1681c3ba759105f SHA-1: 27667f469a6d25969b8d660d5db6f175a47caeab SHA-256: d0676bff98f6d5a9d57bf6f381746b6129c1cb9e5fd041fc70d75aa9f16ad9e7
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to lead the user to potentially malicious external content, likely for phishing or to download further malware.

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 https://aspaeng.com/files/image/files/94661072794.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f12ce0c598a---44102391304.pdf
    • http://wo-kop.pl/userfiles/file/zepowexodukanejiva.pdf
    • http://www.morrisjones.co.uk/EditorImages/file/2023167594.pdf
    • http://usmleworkout.com/files/file/tumujawevotisadovuri.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2961ea6ef---72339881541.pdf
    • https://chiataiec.com/userfiles/Proj_Name//files/pisosejurinefuluva.pdf
    • http://intrinhgia.com/admin/webroot/upload/image/files/faxoju.pdf
    • http://studiotecniconuti.it/userfiles/files/riromi.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/95e00a46fb9dd77d6e96c22b065350ca/95953101436.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/2c2e54b76e63316b80d04de89ab36142/4146055191.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160972037b2543---teketifinikogivovo.pdf
    • http://sitoad.com/bbqjoekey/files/202107170944336301.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/pvt1rhoa2oag8d59lrh94efme3/30160298505.pdf
    • https://fallahi-sch.com/userfiles/file/titabiditesebizakelupete.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b9ea09b9cfe32cd355cc7cac3a11531/repatikabetosewifugodoxal.pdf
    • https://baatco.com/ckfinder/userfiles/files/werevuziluxiru.pdf
    • http://schodylux.pl/userfiles/file/gafumonapetowega.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/be3e8c7b291a8c330c4a018796ab8458/pejuwibibut.pdf
    • https://mosallaesf.ir/uploads/ck/files/wugat.pdf
    • http://bigxra.com/uploadfile/file/2021051706243573499.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/c98820e83352083fad219c85d8a327b0/mugorifokabod.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef8c90bab7---bafuf.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160baba7205fba---63549159776.pdf
    • https://tailormade-sales-marketing.com/userfiles/file/46030864522.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=kws+water+well+drilling+and+service
    • 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_off0000edfd.bin
9071102b1452de8924478357f0dd5e31957362da64ac9f16a5ed909bafa9a761
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 17472 bytes
font_01_sfnt_off00011bd4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD4 16792 bytes
font_02_sfnt_off000133eb.bin
25fc139f04e201ec4da47df260195f5db1753e28360e7eea1ee5bb4584dbad85
pdf-font-stream PDF embedded font (sfnt) at offset 0x133EB 10568 bytes