Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c22afa6591f3e5…

MALICIOUS

PDF

86.7 KB Created: 2021-08-10 07:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2fc8d79a13ba4dd0d84cb9b0bbabe4b4 SHA-1: 66aa94d3aef8fdc1699ccd2b2bb7dcada8eb10d6 SHA-256: d1c22afa6591f3e5ebcb05b9cc66f49d94e10a477dd37aa23ec6c01e8c4cbfeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF structure itself, combined with the ClamAV detection name 'Pdf.Phishing.Trojan', strongly indicates a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cf6a03cd0---12798716923.pdf In PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/17727514050.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/mhbl353jhsab15pp3cm534gitu/16669438721.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/35497764132.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/pufebepesitovofuro.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/e889f3ed7f4231cedce1d2764dc856a7/83571351074.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e32e9db9ca---6861748105.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd52bb1981a---larufiruzuzifodixa.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/xifevilapate.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/wasozup.pdfIn PDF document text
    • http://nensi.si/upload/file/48522208548.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/worowofazexazuzaporamufi.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32e0d1522d---jekojomabosida.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/bademagifirenosuvogufe.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8e38474d2---jasepexunalewokubare.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/4569267412.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/50977336569.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/98757018191.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16102d5a232cd5---43298759597.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c42b1c6d3---xuvube.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/67fa1cba9b041c45f099200e3c6e6cad/64140505080.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904cdbdd45c---vudadibifo.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/ag3n1t6qt4ij8a8vgcus81hqb5/buvufinasidedokigone.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=team+xtreme+titan+launcher+downloadPDF 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_off0000ef10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10727 10720 bytes
SHA-256: b8c8e7eca71976a6d1baafe8d61c9118b0566da8ae74df310197574b4614bf93
font_02_sfnt_off00011f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F93 17300 bytes
SHA-256: bc1522d2df17b8c22ffa98698288705f430538e9af082749fa0e31a40de7b658

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