Malicious PDF — malware analysis report

Static analysis result for SHA-256 6297876def3c6930…

MALICIOUS

PDF

79.1 KB Created: 2021-09-16 15:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c104d54379414047431a1d45b18bb54 SHA-1: 9697e5a53dfaaba90b4d23e9d3639e1f559dc29c SHA-256: 6297876def3c6930d94ca5e1e36d3e2d46009ee7e1b9e676d0a0ec400f14d9e6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/59e06d1013ecca3ecc5aa764fe9f12d1/xamerefasatufaxonudet.pdf In PDF document text
    • http://an-professional.ru/img/files/file/26545982245.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/sowefilobegonidusojag.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/34493570988.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/pegejinenifolegoxerer.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/727baf8441bc3d7c37ed9657bf80c34a/lesabavoxekabakozokekanaw.pdfIn PDF document text
    • http://geasit.it/userfiles/files/diwosululudu.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/baxomefovegofelijixos.pdfIn PDF document text
    • http://yuh-tarng.com/userfiles/file/68769147921.pdfIn PDF document text
    • https://avela.md/userfiles/file/21698996901.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/cb86d2fd1755a18c30620549af73409b/moporadorikakaka.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/68187621949.pdfIn PDF document text
    • https://citrasas.com/ckfinder/userfiles/files/rarapejogowebagapure.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/876481111.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/vazixumig.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/morujowasewerixuxukejojo.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/junexuwogaxo.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/31479865059.pdfIn PDF document text
    • https://coevent.ru/upload/files/jejuzedutipige.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/vabebivokelewakajafati.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136902738c61---tumivuzesexirerafe.pdfIn PDF document text
    • https://melz-feu.ru/upload/34960268076.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/kovare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=woxter+android+tv+900PDF 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_off0000d022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD022 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 17840 bytes
SHA-256: 93b5475259867572f604cd1e935a9e5647d6f2dcba3ccd33c3ae891a97fdd78e
font_02_sfnt_off00011732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11732 10476 bytes
SHA-256: 1a78ab9749148b00f7a8930a4f28aee86166bde33286463c27ca60610e7bef60