Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69da6f29faede8a…

MALICIOUS

PDF

84.3 KB Created: 2021-09-17 04:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 947505c1e0a9ed774354ebf1c14fe039 SHA-1: 645531a505252ca4ac2b84b72a3225f1ff169779 SHA-256: f69da6f29faede8a9ec7b881c384098651e875aaca9de2e45d8531de1c98c9e0
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. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

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 http://vititanon.com/user_img/files/67119302063.pdf In PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/72283590907.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/47028888083.pdfIn PDF document text
    • https://hinaweb.com/upload/file/84976369893.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109100853573123.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/nurerejinozugon.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/biredanubikogifososewex.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614111b440607---16079957842.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/welajirubuzixi.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/83172349263.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/14085884335.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/34606389244.pdfIn PDF document text
    • https://combrooncom.com/contents/files/vefomujetisufejulorowinim.pdfIn PDF document text
    • http://huonglonghotel.com/uploads/image/files/9245779196.pdfIn PDF document text
    • http://superazs.ru/images/news/file/6664513639.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/v8op18j3pjvpkjcrh00s9cv91p/88676722366.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/xejelofenolopelonarudinib.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/pudulowewinuk.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143eb4c54ad4---tebomajokewofumusigi.pdfIn PDF document text
    • http://ceiling.holcom.vn/webroot/img/files/lotorevuruvutib.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/bibowi.pdfIn PDF document text
    • http://plise.org/userfiles/file/90956847521.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/wazaruj.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/3242d5f68d8524131b5f9049ab749d3d/zesidotisoz.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/numizesopusixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+change+refresh+rate+in+redmi+note+9+proPDF 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_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 11268 bytes
SHA-256: 807b1ad225fd7a32e5ae0119dd391f4ea1edc60df59fe89fde19d40ac0d876fe
font_01_sfnt_off0000fafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFD 18632 bytes
SHA-256: e4832f34e4a4a5f170afb2226f74fc42b642bf64d54a23992ab193e6c3cb24c2
font_02_sfnt_off00012ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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