Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c8bfc39a7d349b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-03 20:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3f2110c846d93f43974c823869de8c33 SHA-1: 4b9d5bae460d7eadf38b6f0070c74237eeaebe08 SHA-256: 07c8bfc39a7d349b8605fcbd9a238edf6d0876a4b041095a5f1338b319f45bce
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating it likely contains malicious content. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be redirecting users to external resources, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://lexen.ca/userfiles/files/ranawifusubepaz.pdf In PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/f7d8e910d3b37ceaf7d9842d34c0793f/zaxewaregepokijavodejew.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/46166212857.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093f8b318da0---juxene.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611db54874f35---59489301529.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/av4dai0l4rgmv5vt40duhihdvg/luworon.pdfIn PDF document text
    • http://metall-press.ru/files/46641602483.pdfIn PDF document text
    • http://euroambulans.pl/userfiles/file/62214042677.pdfIn PDF document text
    • http://jimsclub.net/new/board/img_tinfo/file/20210808224248.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/xubigokun.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/mjniqh0chb5tnkil3b3gai0ll5/65002955310.pdfIn PDF document text
    • http://belovosushi.ru/files/94878078616.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/30607426824.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/58867391999.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/morazuzasaratutafesidep.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/wakofavuguxurisitap.pdfIn PDF document text
    • http://scantech3d.com/files/92586538848.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/57629629995.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c780ea1cc7---wenekujaranofaluluk.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607badcc1062a---zakipela.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/68223808306.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16083aaa01239b---mujovi.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/f4cdc950dc7e5c42074d5d176cad9c74/vutameze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=ford+focus+2014+owners+manual+pdfPDF 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_off0000de14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 19936 bytes
SHA-256: ed5a5cc93aa08a2fa6c06f2033d802c5965c53803a8c45b59a00f2b462ac051a
font_02_sfnt_off0001289e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 11124 bytes
SHA-256: 3c8582a6c75081f9b741721973896d498f63e4683ccb7ba404dfdc5665abe825

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