Malicious PDF — malware analysis report

Static analysis result for SHA-256 1570eb7f48bf7dd5…

MALICIOUS

PDF

91.4 KB Created: 2021-08-20 03:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a0f4fdead9f354a23491af7cc52a439b SHA-1: 3861383f66141893b6cc4fc096c34a0baa593aba SHA-256: 1570eb7f48bf7dd5d5bd0b1e87908871eb9f01a2423e2ec09ecaeda74bc12cfb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a credential harvesting lure. It impersonates a multi-factor authentication or one-time code verification process to trick users into submitting sensitive information. The document contains numerous links to external PDF files hosted on compromised WordPress sites and other domains, suggesting a phishing campaign that leverages these links to distribute malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa98afcd5b7---xutaxalixoxaxuruginit.pdf In PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/97154077836.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078066f12ae0---lorosilowulukedazu.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/78093848117.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/42836791735.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/liwunimamikesokojuwipabej.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/4751c7dfa30e1954b9d7497849719501/32365521376.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-8-18/20210818093113268118.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/tikulilatirow.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/9c16e5a2632f944d26800ba3f4ac7f49/bepofojazilovawimebinoke.pdfIn PDF document text
    • https://mauspro.net/upload/files/tutibumaduf.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/6ogoncstfvph6tuf7ui9h3sq6v/gibunanepejefuvuwo.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/52143665827.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/a34b146ae04dd0eb7b9adc2670ab8e6a/13838212458.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e63e83f3c0ea0204d60fc5311978ebfb/88511789798.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/45435161455.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210813_115945.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/38552606234.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/7989bf5ee4c605a8bdab997d33ca14d0/rowajipudisax.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbca34b117---2631682403.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7dda8561e---20150654172.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/10495671672.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cac4f6dff4---95411877079.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/80196300829.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/add73776745caaad468811440fac3b6c/90724910869.pdfIn PDF document text
    • http://edsmithestate.com/clients/8/8f/8fcea3baa00381bb68ca4dcda22eb4c7/File/sirusepusegazo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=china+number+for+zaoPDF 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_off0000fcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 19520 bytes
SHA-256: d041ffe45432910ec12081567facec5e265155912756a5b2860df40c9c4151b8
font_01_sfnt_off00012ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000146ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146EF 10496 bytes
SHA-256: 0a04b440c670ba27196e2ddc6dbf411c9022a6115d471e0a10cbc3e2cc9766a0

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