Malicious PDF — malware analysis report

Static analysis result for SHA-256 7295ccd37aa1c212…

MALICIOUS

PDF

86.4 KB Created: 2021-07-25 09:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: adb7e39e038fad9637978f1ec80cc970 SHA-1: b8c6514bacde6d54e750e05db6477ebc1eb903d6 SHA-256: 7295ccd37aa1c21262776ad2367fa90cb2c42dfd65eeb12b9f1a71e386ce3cd4
176 Risk Score

Malware Insights

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

The PDF contains a link farm that points to multiple domains, including compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. The presence of PRC/3D content and a high ML classifier score further support its malicious nature. No scripts were extracted, but the structure and embedded URLs strongly suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 http://movitecnic.com/ressource/site-image/files/74983543886.pdf In PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cihiqpf3q6so6v94slecj866s6/pitepudanere.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/51749212682.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/bepemojelibe.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/32003740912.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4ef3c4df5---84000361413.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5a61eca1c---41085564800.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/bafeb.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/74c1f2f13b27d921125d8df9d939e628/rezosuwabikat.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/rogimapetaxefepurowakafov.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/c8hhe929ccf5jeqasdj8k186i4/kivow.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/631b59lo80ugal3bgap5b3u8f7/filofuterumupolu.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/82755034558.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16093e4c7c3db6---21128561338.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/vqas76a2t57b4jk2negh2e8mk3/93460687349.pdfIn PDF document text
    • http://honmamon-s.com/img_seminar/userfiles//file/40908927511.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/12hs0lbv97212r140622lnvjve/kalakul.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f45206f60---pimevur.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd70446129---34072867396.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609436c8ba6b3---82989168583.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/99447859566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=girl+scout+daisy+mari+petal+activitiesPDF 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_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 17848 bytes
SHA-256: 72597e0444a0339a47d764033b66c3431c2f0d87375068aaf5ffae31682f36b2
font_01_sfnt_off00011a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B1 10892 bytes
SHA-256: 26cfdf79fbd28b2448181a925fecda8c00de20479808b42b23b4c9f877ca65bb