Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0ab56d45ebd2b8…

MALICIOUS

PDF

82.8 KB Created: 2021-09-23 13:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cac4f3e6fa5f57e20821e3a3b4e6a177 SHA-1: 83a194dedbd62f3701b2f5b5f5e185e173d59060 SHA-256: 9a0ab56d45ebd2b8f43722e9cd802397800a7c6304e41cbff2a1b1edd601191d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting domains, a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://turkeyinsurance.info/images/file/55049522616.pdf In PDF document text
    • https://wolfgang-photography.com/userfiles/files/timakatiwabitelevenil.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0b0ae4bb9---11929167935.pdfIn PDF document text
    • http://furniture83.com/upload/files/29193051131.pdfIn PDF document text
    • https://desco.scp.hr/files/55308997446.pdfIn PDF document text
    • http://getem.pl/files/file/kulilitemememidokuk.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/tofinetitabiwolevusopizi.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/jagexizaf.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad1b49a358---jusokeruxoruwolakarumo.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/73070010307.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/fujerafalukalotubi.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210906_DDA6713919D3FA51.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/jaluw.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/gejokejikeveviverejilafa.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210921135234.pdfIn PDF document text
    • https://theipbuzz.com/images/file/83803825517.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/79967450578.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/15256991654.pdfIn PDF document text
    • http://uteambio.com/upload/files/17181654868.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/vogofutitafegobuxaxajuwo.pdfIn PDF document text
    • https://krajkarka.cz/userfiles/file/9598434038.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/towonoxolojederepub.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145662a0a770---xavajixofezumeziduf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=gt+racing+2+download+androidPDF 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_off0000dbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 19128 bytes
SHA-256: 02e6b3dd9bc057e630f4ac22b35f3edabb8ab4c8e5362254dd0e2aa1006204ad
font_01_sfnt_off00010d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6F 10488 bytes
SHA-256: ac9dc64f416bd6be90ab16de403312f0e260148220fb01a8ff012445184586e9
font_02_sfnt_off00012552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12552 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1