Malicious PDF — malware analysis report

Static analysis result for SHA-256 908c57bce2abfd37…

MALICIOUS

PDF

84.7 KB Created: 2021-07-05 12:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7a86d47cb5825c22e88f841816ab7581 SHA-1: 2a8deda7a4466cd0881aa5d64095956b34d53b13 SHA-256: 908c57bce2abfd37f271f4115c4d6efb244c2b521c3ab700b4d6435f10aa959f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or phishing pages. The presence of external URIs and link farm heuristics suggests the primary purpose is to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=why+do+guys+disappear+for+a+few+days PDF link annotation
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/9d2e2f44e28112c4e0a242e4084a39cb/94865055910.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/47682278286.pdfIn PDF document text
    • https://ikansambel.com/contents//files/keriwus.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/3ffd14ac79ce168e7eab4eeb185f14db/gizepelalona.pdfIn PDF document text
    • https://ebooksweb.net/files/file/94914040079.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/86668377303.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/48531072602.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/phnogu54p84vqdrbehga38irpj/duzaragagiteti.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/b830fec80a821a4fb20f7c7628ef8651/pofuwib.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/zutukemev.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/b1e116b0eac6f9b77e9782f949976eb9/3139913227.pdfIn PDF document text
    • https://norservis.info/files/files/12825209800.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/47996617062.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/76350757863.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/bozutosewobudoluwisila.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/3u0e9m541d186tg98bpp9h4du4/60686955724.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/27411830614.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/7733462d3a1a620718cdf10b51cae462/76530022306.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/lababuzefukafanakib.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d922ef0b8d---xedexavupapugapomifinej.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/73602544251.pdfIn PDF document text
    • https://yellowstonewildlife.com/potinarasometet.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc9258ce1f---67978693481.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608453b36fe6d---81796381456.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 16948 bytes
SHA-256: bd13177a8ba4a2cb65302d20be19fee86a98d9497ae6f89eb53d2f9d401a3038
font_01_sfnt_off0001145b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145B 10820 bytes
SHA-256: f7017a10015c14ee3736cbfca39960a8342602100df3423bf48b2918fd162238
font_02_sfnt_off00012d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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