Malicious PDF — malware analysis report

Static analysis result for SHA-256 506a7f4644da3344…

MALICIOUS

PDF

75.7 KB Created: 2021-09-05 08:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 744b86a274cb908855300a07797be65b SHA-1: c8d4c0683f9757ad9a619b7862a46e46baab3ad5 SHA-256: 506a7f4644da3344827168d675b0f3afac1cc96240cfb16d9f915008c69dc1e7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting a phishing or malware distribution scheme. The file's structure and the nature of the URLs indicate it's likely part of a campaign to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://philabc.ru/uplcv?utm_term=textiles+basics+kadolph+pdf PDF link annotation
    • http://lpkgoodframeupvc.com/userfiles/files/58263755928.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/movifawafemajuzope.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/pexuxi.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cca4075c488---fezipalixipoba.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160816200782b1---54933030786.pdfIn PDF document text
    • http://azizolace.cz/images/file/9440032317.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b8264de55ee39b0a74b8d5e19e19508c/riguxisanalurano.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/kerunise.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210714035340.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/29904733919.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b979ebf933---wolumivun.pdfIn PDF document text
    • https://kuepancong.com/contents//files/kefimu.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/tawidiwomamupeximerumev.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/54997956680.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b59ead7f17f---logevibobubepaguminakoj.pdfIn PDF document text
    • https://istanajp2.com/contents//files/ponago.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/nitakaxa.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/643fa48ca332c0f6dbffa3c6b31ba7be/59368056588.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/vv85gt897lo7mm369hk6ghuh5m/nufozaturaselorodu.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/reruwadol.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/fba3b3a4b45aa385ad2b931090e6cbc4/22036181362.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/63576018510.pdfIn PDF document text
    • 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_off0000c34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34F 17424 bytes
SHA-256: 99e2cd7f329b2ef35923a3e2615f9edb5874aceb3ddf1ab18262b759cd112000
font_01_sfnt_off0000f065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF065 10812 bytes
SHA-256: ec6ba9e4d938fef1c933a2ca0a8bd46413fc28f19850151c79b394c0aeb3d678
font_02_sfnt_off00010948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.