Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61c08fba15356ce…

MALICIOUS

PDF

77.1 KB Created: 2021-09-07 03:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: aab5dcaa1178bd833b23b42156b40ea8 SHA-1: f7dca939382f8e68f8ca1e5b709ba3a3ae6167cc SHA-256: f61c08fba15356cedd2b2352b8a282eff55d9c69c6dee6628e371087c08a4b77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content. The embedded URLs and the nature of the heuristics strongly indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/uplcv?utm_term=past+simple+and+past+perfect+exercises+pdf+4+eso PDF link annotation
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4b87f258c---dogijizi.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/16978050777.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/xewixona.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/cain4pb8inno6cu43rffqas56r/poxigidowujix.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/4f7e717a936c32a9f10ad01aa12c4ce1/27204808720.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/jexodisubezizave.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/pezitetize.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/42128f.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/e68c5c3eb5603df2151f6850d0053b82/wukiwotosati.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f69a364b---55144400189.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160ba90a333850---399461905.pdfIn PDF document text
    • http://pattersonandoliphantfamily.com/clients/875492/File/18135792237.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/16055049935.pdfIn PDF document text
    • https://rovetco.com/userfiles/file/66620057404.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/le7n6h21mq1m2ma4rpg5n48cb7/razolezazinawipibiru.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffd740df3e5---wewezaruxefomovijez.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16118829e4114d---98234916008.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/47324888000.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/gexopedug.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/gafujimulepegitukut.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/lasafixanalinez.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1609cad2804104---zexivaba.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_off0000c4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F9 10960 bytes
SHA-256: 6dac5588a2903332367223588b15afd6073a87e7fe22ee6ddfcd931da0675f7c
font_01_sfnt_off0000de6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6D 18620 bytes
SHA-256: 1b2f86aa69845d3a090d7fc48613bcd16e074a2343d205e77f9886a14c2e713f
font_02_sfnt_off00010e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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