Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8e43c0a662f377…

MALICIOUS

PDF

82.6 KB Created: 2021-09-01 10:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f3717929c60a5c8071317622e7a8e7f4 SHA-1: 9480785ef84e89f06ce183931c778161d8e168bf SHA-256: fd8e43c0a662f3773ce48313d343e42efce052db62cf02aabf9c28b51e1a4f9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of links, many of which point to compromised WordPress sites hosting further PDF files. This behavior is indicative of a link farm used to distribute malicious content, likely as part of a phishing campaign. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://dbmotorbrokers.com/userfiles/file/lenodikexojowupimowolene.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd70a12c4b---xivowu.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/94511420181.pdfIn PDF document text
    • https://trieurodata.ro/images/file/kuneloforunepazigida.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/f60b24d9fb56315d206c4f79197f1466/wojiwidisetopu.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16084c8e7320b3---laruxitemejojalowotevife.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/fetire.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160865f48b8619---dowilokorunepoxibodopa.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160919eef79f8f---6535219493.pdfIn PDF document text
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/kopej.pdfIn PDF document text
    • https://songhong.info/userfiles/file/71116504383.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/takokomoderexalefog.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f365e54d3c---bibevezifaxa.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/o9pnbfah0k3t0adt9jjpfjaln1/60039187638.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/bofabilegarivevorovogubod.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0642438fa---573380018.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/48926755602.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/gixumupotoz.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/wivifuramotinelixabujama.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/34041577603.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/bivositifamebevedo.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/bedawi.pdfIn PDF document text
    • http://m2m2design.com/userfiles/68905461170.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba5b22356---sodafitudejesevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=derive+is+curvePDF 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_off0000df94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 9860 bytes
SHA-256: 9a85f1851ede853cddba7310e3d2fc2b4fe7dee3a9e721994dde31a145f65045
font_02_sfnt_off00010d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8C 18648 bytes
SHA-256: 25dc171c3453459b26be0acfa8310fc96d0bbc2ff7beec62abec41ae09fb4ac3

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