Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdcdcf08b029e86…

MALICIOUS

PDF

88.1 KB Created: 2021-07-29 17:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 433130ec201d1ef007bd352682fdad0a SHA-1: 6ad6e74809ae50d108448d7dd495a59d8de14290 SHA-256: 7cdcdcf08b029e867447c51ad4520e1348d0d480935c95d910ea15b92562c0a8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=what+is+abnormal+growth+in+pregnancy PDF link annotation
    • https://gannat-ltd.com/userfiles/file/64529732019.pdfIn PDF document text
    • https://ottenburger.com/userfiles/file/88902061886.pdfIn PDF document text
    • http://industra.sk/userfiles/file/tavimiworirur.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b74e9dcd502---87085126102.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/jonezona.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/98654369879.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/d6786476296e0e1d03f130d8c2368494/79334488255.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c928b8687b---podupokamadot.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/potemazomiwewajeneganofuw.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/8615258962.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd467be0d3---pigenizikinapozuzak.pdfIn PDF document text
    • http://yjccnc.com/upload/files/molozikuvo.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/30cc4fef9dd25f72348b2a7e863bf403/tapadej.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0a0de1adb---xijifulipitori.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/99280419161.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160887102a63a9---wekapevesupufunidupawixa.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/gumafusulesogasagujew.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16078615dc1849---jepevirizawibutilideximid.pdfIn PDF document text
    • http://standdominica.org/files/files/39407162886.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/nq12fufbpjqm4t1lg9nq4hbqp4/divike.pdfIn PDF document text
    • http://berbun.com/user_img/file/muzozowegi.pdfIn PDF document text
    • http://halaljones.com/uploads/files/vaxujusixizufinepujova.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/fb98630071422a1a270c79b7be023162/15271325523.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user///file/_0723942001625123790.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/3566abf003054612950a9bf7b8deb44e/fixupakituwobego.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/paruruxujetubeko.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_off0000f4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D3 11156 bytes
SHA-256: 35d51b830b1c04291f1b0fd157baffb15ddee9fb123adf8fb2000ced12a5bd19
font_01_sfnt_off00010e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A6 16772 bytes
SHA-256: 640ecc8ba8407b1d26d7ad05a99e1f1ffe292a4fc93191ebcca03c8b6f6e3493

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