Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccaf3aa9de3402a…

MALICIOUS

PDF

99.6 KB Created: 2021-08-06 16:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b14c1e94a409a5d0b1bc07eb708a152b SHA-1: 5f1158e0063525f853ea555a6b8db46fccb89449 SHA-256: 7ccaf3aa9de3402a9eda2989cc102d7c1687006b14d914e417154b4b90156228
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm pointing to various URLs, many of which are hosted on compromised CMS upload directories, suggesting an attempt to distribute further malicious content. The presence of external URIs and a link farm heuristic strongly supports the attack pattern of luring users to download files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ketchas.ru/uplcv?utm_term=camtasia+studio+8+portable+descargar PDF link annotation
    • http://www.advokat.com/app/webroot/img/fck/file/sitifafopodefexapamediw.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b32b346f151---masafa.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/90ei9dlge24djmm4tmpjvumlm8/56912015209.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/garesevuwifekopejoti.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e37a350ac5---vedogilogulivije.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/pitalom.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a475751e---xuninajobasevumijadiviloj.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5aba6367c---madewudim.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/xijukubezuperos.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/77001461990.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0f8bcf08---29700509580.pdfIn PDF document text
    • https://kamedia.vn/data/file/13837222660.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/vobanu.pdfIn PDF document text
    • https://ghnservizi.com/file/57301706048.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/7f4100c7310269173b8f35c7d372c2f7/86112862077.pdfIn PDF document text
    • http://sro52.ru/uploads/files/tudisoxosalutukejigev.pdfIn PDF document text
    • https://fuoriscena.eu/file/55557822012.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/zekeworumorejax.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051312250452.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/rovipijexagu.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607652dd9f52b---depepezanawikeguganuko.pdfIn PDF document text
    • http://www.youtube.cIn PDF document text
    • http://www.youtube.com/user/teamxpressplusIn PDF document text
    • http://www.youtube.com/iteaamgfxIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00014a6b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14A6B 17612 bytes
SHA-256: ad12a90d3b01c024fd26bca9c29c9aed5b3834e2a1ebf655b42cc6950318c5bf
font_00_sfnt_off0000f383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF383 30592 bytes
SHA-256: 510c7f412ca9a31b2da3abcda646c7e42fae19c5126fdcdc2c81aa2f90a12829
font_01_sfnt_off0001325a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16563 11232 bytes
SHA-256: a5e84a6b93cf0342e8960dcbb353d528c0710df295fbdbb61afe543f594a53c4

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