Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0f437147ec4de0…

MALICIOUS

PDF

78.8 KB Created: 2021-09-16 06:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 34facaec216fea4184f0bd4fc64730e1 SHA-1: 2033d6dc2e951be46d5d3743cedb6fd8e7e591f6 SHA-256: cc0f437147ec4de053b5b1ebe2ae6d8c305aff56dbcce9c65167d24e79f8f975
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. The document body is heavily obfuscated and appears to be metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://haps.company/wp-content/plugins/super-forms/uploads/php/files/2f5c01cdd93fcce57f27dfa3eccfd59c/marasisavojozowafekejum.pdf In PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/sekomagimawewurifewe.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/35553279505.pdfIn PDF document text
    • http://myepres.com/HotelEstimator/userfiles/file/12348858183.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135cef0eedce---sironavunoro.pdfIn PDF document text
    • https://coevent.ru/upload/files/jaxebubokefejopirome.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/18353477128.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/fawefababudusuf.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/56986287859.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/durirusapopibimos.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/nupunelaxipepobo.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/78567430097.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/fosapinide.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/40761115774.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/wasuwawubose.pdfIn PDF document text
    • http://unitekinfostructures.com/userfiles/file/99124285836.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/nofoforadizanulovimono.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/18691647077.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/83038005960.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613302b01d7f4---tedujomuvasuvojof.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134143ce5dd6---furugaroxibadifazewo.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/68319085209.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/wajowagasexu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=earn+to+die+2PDF 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_off0000c996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC996 10132 bytes
SHA-256: 95ea987cc5f35fbf681dac8a9c673a52eb76f989b891ddd449c2eed9b7ad5e7c
font_01_sfnt_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 20588 bytes
SHA-256: 0746e4ebc97b9a62d9b7860b83b300e4c34f33041a1cfd13b43bbcd87f96ed7a
font_02_sfnt_off0001164d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1