Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd65d12f0e63e98…

MALICIOUS

PDF

102.2 KB Created: 2021-09-02 15:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8b86b12506f16f264a042fcacbdcbe36 SHA-1: 41f771a58a582efb1b3ca24e7b1b0521afc24f26 SHA-256: 7fd65d12f0e63e98c3d10c1609dd0176ce9c1c7e84bc83928e93c3f2659d03d0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming on disposable hosting, suggesting an attempt to manipulate search engine results or distribute malicious content. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dufoziboxewawosebebaweden.pdf In PDF document text
    • http://karpatskiles.ru/store/file/rawox.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a2470647db8---xawojoga.pdfIn PDF document text
    • http://homeopathyhongkong.com/files/giwidob.pdfIn PDF document text
    • http://guilfordvikingsclassof81.com/clients/4/47/479b0a304b4cdce99dfe3eda73a59016/File/lojotuxazajawev.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/45887709586.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9579af82e4cb89c961140aca52c57cab/67929866278.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/f176c2df7943582b65f9b175435b1018/62897264318.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/bk37j5q1i27jksa41fu95duv73/waluzene.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/vegajuf.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/77aed4eb2e70f57e74bc294b4078bee4/junajizuzipip.pdfIn PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/4865871380.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/cf0b2cf14fdb47463bd24377236e7f11/xuletapegalijokadiz.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/nanuxelanilusafujelewad.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/gugusuziliveruturup.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074986e9ba0d---jegijufofifita.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/dunuwok.pdfIn PDF document text
    • https://gwynharmon.com/home/gwyn/public_html/ckfinder/userfiles/files/disidugulusasirikawowij.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/68175813141.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/55594166164.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/f52c448af0608c509b65d5fe24b90dbe/lejawe.pdfIn PDF document text
    • http://recrute.fr/files/files/23745027955.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/21006957328.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=1999+buick+century+custom+manualPDF 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_off0001288f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288F 18692 bytes
SHA-256: 8c1d6ea9e15001adf6416facaa65a06e4f8ca1d07c9de14c4c32849597cca73e
font_01_sfnt_off00015955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15955 10960 bytes
SHA-256: af676dfcc13f13c61ed704c8e78b3e794d4accdef77f6b4b7aa71a20e1085acf
font_02_sfnt_off000172dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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