Malicious PDF — malware analysis report

Static analysis result for SHA-256 f386f431501ddc55…

MALICIOUS

PDF

105.9 KB Created: 2021-07-27 17:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 064cf32dac840afb9f5d4b78ebb6fb2c SHA-1: cddcf003af7bdb3a63d75da2251ea6671421bb1c SHA-256: f386f431501ddc5561799d42b5b9f29867a42866036f753aa86e1ae58688e724
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple PDF files hosted on compromised websites, indicating a phishing or malware distribution attempt. The presence of numerous distinct hosts and links suggests an effort to distribute malicious content widely.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/0738002ee75abcfc87ff8af6fb0032ac/44960644617.pdf In PDF document text
    • http://marleenjansen.nl/images/uploadfiles/8945037543.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/99725529377.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/26125451207.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/7ouaf40ok78a40d5q95181ldkn/31265640914.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/j8692445dmdu87iha36nticec4/babugelemodav.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/fogajewanatubufabere.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/0a2e54a24a02810a70c032e88a739daf/60895532346.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16076793b2ebaf---ganetimadizinatu.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/nixovokenezofu.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///foluzexofofepo.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/18485396573.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/3baacb59cc13869e57da7d565f41331b/mugurirupere.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9cddc4dce---29406236156.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c02a488b758bcc07fea6ad526ec3703b/67283043714.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/a2892acb0c58ae697f39b428aac9b5e6/jupivopenesivele.pdfIn PDF document text
    • https://people11people.gr/uploads/File/lufonare.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/57794608768.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/10cf5a587fa944cf36a118c6a960d2fb/23545381831.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/levevinulupefabotozex.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/507e0566283c90c143ffa741f2ec49c4/tikugomimobij.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d8b56adacb2135db31047823adecd967/xusikafukafa.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/dfp7p37sghb6m68r0fhe935ov3/tafomogug.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160f0419e72c16---rabaselakosemesusixad.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/ilohpss4c8pdnqccmj0pool0cp/40923405570.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160add065e89d0---pokodawabazidojuwonewux.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/48747967241.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/vibitosel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=photoshop+program%C4%B1+t%C3%BCrk%C3%A7e+%C3%BCcretsiz+indir+gezginlerPDF 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_off00012ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000142db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142DB 23104 bytes
SHA-256: 3934a3fe3f43e46d748d87fa5715018184c1185b7af883557fb4cc9b3e0d7f5c
font_02_sfnt_off00017b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B22 11548 bytes
SHA-256: 563edf7442fb49225caf01da882811ff4065d6aa179e7913a3d6ca216afb4f52