Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9d85d3df591840…

MALICIOUS

PDF

87.3 KB Created: 2021-07-08 07:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b6c2be31d2f49ebb3503e220741c5ed8 SHA-1: 55dc2ffe25a1c89f5393bb188575caef991df240 SHA-256: fb9d85d3df591840f972a3a89b3da94f44ba6f0671b114556ece274761f42a02
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as a credential phishing lure impersonating the brand 'Apple'. The embedded URLs, such as 'https://philabc.ru/uplcv?utm_term=answers+with+ken+ham', likely lead to a malicious site designed to steal user credentials. The presence of PDF_URI and SE_BRAND_CREDENTIAL_PHISH heuristics strongly indicates a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=answers+with+ken+ham.
  • 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://philabc.ru/uplcv?utm_term=answers+with+ken+ham PDF link annotation
    • http://beateromer.com/bilder/file/tobasudibowisajomawe.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b287eb2ae0f---dasutonapaxemelupuw.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e955696cc0e0fa519dcac13619e5f996/39146208497.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63b46a970d---85236940628.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e6e9b17c---musaxutozojevonurigab.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16076358c58ca6---lagoxujogefuzuderibegep.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/1058831548.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/1295c3f65a2ac3a4c674122dfa4f8997/rapivibojebijasi.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/q6g1pshu6j5331v1bap276fk13/45097394066.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/gujobaxib.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/7474604091.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///23379269377.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160756c0365e4b---63406023533.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8eb05339c---33499311676.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/leruxujaluwawagas.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ik51o7h0mgfuf7cq21au6pl1j1/xedomujazebipenezujobawir.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa13a0849c---57415112430.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c6a33f8f0---ninupomu.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/kufupos.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/4465092335.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607360d939a75---viwuvi.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bb80b8a852b---gilijosifi.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/94bc03da5b2e9f401c3e956940ce88e3/funixenagijigad.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/mosagewujogomotetu.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_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 17996 bytes
SHA-256: 9b5b03d68ddbaacaca76ae959fe56228769cfd3c2c83a2e0e47d548cc078aa75
font_01_sfnt_off000120c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C5 10368 bytes
SHA-256: 82bd6dbe9de52d6937ebdb968fa6fe88bf855d4439e01483ffe28006d826d1f2
font_02_sfnt_off00013818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1