Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f9f2ae0b086f4e4…

MALICIOUS

PDF

74.2 KB Created: 2021-09-01 09:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: abdefdba7997c9be6bcaa3a6687f6ea0 SHA-1: 7b6fc17d1069732cab7cd8dee396130d9c7697f4 SHA-256: 5f9f2ae0b086f4e4f9b723445ff2989b307dc05ea584dafaa9030459a21d3a79
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it's used to redirect users to phishing or malware-hosting pages. The presence of multiple external URIs and compromised CMS upload links strongly supports its role as a malicious redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://medvor.ru/uplcv?utm_term=joins+up+crossword+clue+7+letters PDF link annotation
    • http://lnyuanzong.com/uploads/files/20210701234328.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b10a0060e64---27891493396.pdfIn PDF document text
    • http://e-sportis.com/images/upload/vawurevot.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/93418388464.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98a687216---28184106453.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/vuponinid.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/fl9806a0jlp52jdptpkjqqadg1/25842560637.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b91c0327977---modulidebaguninipokugaze.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/60109642882.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/joduxe.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607317e25a373---woxidiwenefexoxigovalozem.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/mebesurin.pdfIn PDF document text
    • https://pasarangroup2.com/contents//files/34278983580.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a56cb77d9f2---duruxudubiririzikiwi.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/keronasite.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611d75ae12573---zabemujubax.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160856c92b0265---69626295805.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/zosos.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dc0b2b928---vilaw.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/49221919585.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/kezelagupirez.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/7f9471b324d775950b0f665b8d5da8d2/67653456316.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210604_DFDCF14775FE29D7.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/513049460.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_off0000beef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEF 10572 bytes
SHA-256: 12c90f7464cf46b7c9fa2be1de1cd7639b5fc1933de8f33e025d0427b35843c8
font_01_sfnt_off0000d74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74B 16592 bytes
SHA-256: da1ff2ec99e5abbe3c292f73fffffc2c8e15329eddcb1b028825019a16a00036
font_02_sfnt_off00010211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10211 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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