Malicious PDF — malware analysis report

Static analysis result for SHA-256 0384a1cd4a6cca81…

MALICIOUS

PDF

90.8 KB Created: 2021-08-07 13:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ecdf7ada6ee81aafb7c2d83efedcbf2b SHA-1: fcc2495376b3ea47fa27abef873e6872d61408b9 SHA-256: 0384a1cd4a6cca8125f1abfacafb6599ba17837a12aea1df0b2a7dbe22a798b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised websites or disposable hosting, which are likely intended to lead users to malicious content or further infection vectors. The presence of a link farm and the nature of the URLs suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900da7b9990---67843642611.pdf In PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/vuxepavisivubikidulup.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/53755731693.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/25613707775.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50b76d4832---wuramarajazi.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e325af6ff499f7c552615ff29aeefc2c/levabul.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/zipiwetivizababo.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/mitaxaboda.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/xusag.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b04993c711b---pizoxebe.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/xadobasatagonukom.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/7208904515.pdfIn PDF document text
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/vibibepidafarapeges.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210801_E6D5D498C6A6207A.pdfIn PDF document text
    • https://www.jedeminute.de/wp-content/plugins/super-forms/uploads/php/files/q1pr868afd3t34ja4ftd3l24kt/1667832038.pdfIn PDF document text
    • http://w-mill.jp/images/file/36150625748.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/guwuwat.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b9caf059903e4ba247889a371405f166/wusejeziduwokovixaresana.pdfIn PDF document text
    • http://446888.top/userfiles/file/gazovubozi.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/56743753013.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/011261fe855ad5c93b1208c3aa26632a/pugadesij.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202155533505218.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/2809f5655cd2688769a3cd30135a4d4f/xemujukakububewobiwap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=acronis+true+image+2014+bootable+iso+free+download+full+versionPDF 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_off0000facb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACB 11564 bytes
SHA-256: 354069a2296d0f116b103edf5a12760b42cca0ee9c0afbe203f67b144739b7f5
font_01_sfnt_off00011635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11635 17444 bytes
SHA-256: f032acb8f9bfe54730d6e53d933595b44afba470a16c5940e40eb8181cc743ec
font_02_sfnt_off0001441d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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