Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3facc66f9c1737d…

MALICIOUS

PDF

86.7 KB Created: 2021-08-11 23:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0072546cdf32a9554f4b06f74160155a SHA-1: 521fc92e7083d130641ade571ffccbc3d92a4976 SHA-256: c3facc66f9c1737dd32f736f2b8c3aa0fd550936891018c07f40c79d354521dd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566 Phishing

The PDF was flagged by multiple heuristics, including ML classifiers and ClamAV, for being a phishing attempt targeting iCloud credentials. It contains numerous links, many pointing to compromised or disposable hosting, designed to lure users to fake login pages. The embedded URLs and link farm structure indicate an attempt to distribute phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=icloud+activation+bypass+tool+v1.4.
  • 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://winecellarkeeper.com/ckfinder/userfiles/files/donupugapuzutu.pdf In PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf57b7ab666---26409175403.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/debeje.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/mejopajik.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4868c48318---65000477310.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/36322674424.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/sozunujuvi.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/zudofirasew.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/95715256187.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/39761199107.pdfIn PDF document text
    • https://papiratisk.cz/soubory/puzixajabonizizekibamumo.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/38173203770.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/b23aba9d2335c61e89e6c4593086c111/51963590058.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/sigowigomerovapulat.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/f77103212f8addbe9603a85ef055052b/lajuwesozameseduzojok.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/5183882606.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/44804196322.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa476c3f250---35345315766.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/38117278292.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/s4a3pr936u9undffot1c034211/95364114360.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/tijoza.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/mofosuwekivazu.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096878db921c---tusexokawise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=icloud+activation+bypass+tool+v1.4PDF 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_off0000ecfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001050c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050C 17588 bytes
SHA-256: 7f20993463dacb554eb2dad7994df946cb6577892a2c4c7a4b6860cfe0f39554
font_02_sfnt_off000131f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F8 10844 bytes
SHA-256: 5d6c33a9e527d32c20054241a7cd8b776481d5700d314c3f24103f2cd66407a2

Open this report in the interactive analyzer, or submit your own file for analysis.