Malicious PDF — malware analysis report

Static analysis result for SHA-256 07547c065b302f16…

MALICIOUS

PDF

82.4 KB Created: 2021-09-01 14:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 43b1770a201935f948a7008352488c94 SHA-1: 3aeb8460d0051e5a6ac098b96bd660b0318fdfa0 SHA-256: 07547c065b302f166d704405da16b6488a2ef5c8882976a1a7266120ef42b197
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to lure users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO poisoning to drive traffic to malicious sites. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://sicilalluminio.it/userfiles/files/wobowu.pdf In PDF document text
    • http://tdbakademi.org/userfiles/files/23466710609.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3214ee5af---52569948211.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/xatujubaramu.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/kazomegoxoturugupewofipo.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/fusewoweragibigaxiwa.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/dexudetujavepineraba.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109270fe7a2e---wadanonipivijomemen.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/96057847649.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3e5d8a44e---favota.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/kitudetinazoxuvamebokug.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/86709256125.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/da0ff96f6838cfe88a7d9c4ea043eb3b/42273361866.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/lofibomonomavula.pdfIn PDF document text
    • http://quinta.cl/upload/files/75618770498.pdfIn PDF document text
    • https://pasarangroup1.com/contents//files/vugemimakerisetajekolu.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5837c4d0b7---jomasoxeduvulunaj.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/bosamofoterojasagipotowu.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/41982207338.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd7b462a7d---74893402943.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/ramevamanipewupazus.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/32502132339.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/22577312800.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/bhsi8vnodqm8upath0p8mo3hd1/tulebenozufomaribujuro.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070fb4f73d9c---duxaparakizuxebebu.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608467a19d5e6---wolijurenofaleraletekawi.pdfIn PDF document text
    • http://regmac.net/userfiles/files/mufat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=sweet+face+camera+downloadPDF 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_off0000db0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF322 10536 bytes
SHA-256: 1759932915ef0ad63db35e8bd87efd1c19081742b02ef3d5838c9c6fbc1f1cea
font_02_sfnt_off00010b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B35 18640 bytes
SHA-256: bca079f36b482e8850beac3f992e7961408cd38f572a82cd7006b9db9d6566fd

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