Malicious PDF — malware analysis report

Static analysis result for SHA-256 8001c5de8e72cf57…

MALICIOUS

PDF

92.2 KB Created: 2021-08-07 22:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1ffe4faf35819fd507b23ecf63dcfc47 SHA-1: 6290c518091011b6f28b30b582cf843474a2529f SHA-256: 8001c5de8e72cf57f22ca5a15d13a46d1e67179ba22d7641b34201cab2aa4641
196 Risk Score

Malware Insights

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

This PDF document impersonates UPS, a tactic identified by the SE_BRAND_CREDENTIAL_PHISH heuristic. It contains a link farm pointing to various domains, likely to host the phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into entering credentials. No scripts were extracted, but the PDF structure itself facilitates the phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+register+nin+online+for+airtel.
  • 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://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714e6945efb---logenakunupobez.pdf In PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/1c152c4cbc3533c9a9659c715bcf892b/lewonosivoxebupifuw.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/39171209699.pdfIn PDF document text
    • http://sherylrobphotos.com/clients/56056/File/palidu.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daa390c0c99---76946280818.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/timogegimusakufomasadup.pdfIn PDF document text
    • http://calisnt.com/uploads/files/12579165851.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/xesedofi.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160939ec0ea5dd---bivij.pdfIn PDF document text
    • http://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/wuguvesorabitaje.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/1726498486.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8aa6beb50d---jusuvinejesidanojumi.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/giwekofugukawijoxawili.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/88043502596.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/75d1e5598efdd6645b1c6c2161573659/42843737866.pdfIn PDF document text
    • http://badgerhillfarm.uk/moxupenilutapemaputado.pdfIn PDF document text
    • http://farashimirooz.com/files/vomojexepulikodapibogorib.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/8fd9c853ba362a72fdf869ff9f546e8f/10220996431.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/setelatawojolukadebopa.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46036121884.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/pepipirowezagalot.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/22659900543.pdfIn PDF document text
    • https://alutat.com/data/file/11630777295.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/bc5782e3dec66b3b54a1ae42a88d5ef8/niraxobidiluxunofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+register+nin+online+for+airtelPDF 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_off000103e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E5 17808 bytes
SHA-256: 0b632bb5ca0a548214dc18014f1925be54bf21cc29e8ea653a97e820371cc764
font_01_sfnt_off0001327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A92 10464 bytes
SHA-256: 3b899b327a7ef166bb137e61621500836e84d3c0fd508c2d211ce8ba3eb7b80f

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