Malicious PDF — malware analysis report

Static analysis result for SHA-256 60056be39eb8c285…

MALICIOUS

PDF

93.4 KB Created: 2021-07-17 17:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 73f29ca98ed1c17e1938d9fecd740f64 SHA-1: baae4f402d80654bff2460e405c5f673e10ac7ff SHA-256: 60056be39eb8c2856baef86418931bcbaaf028f7913043eb100a72790baa7863
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm nature are indicative of a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://uctodane.cz/UserFiles/File/ronasadifaleleseguj.pdf In PDF document text
    • http://dongsachhanoi.com/webroot/img/files/vumijis.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d4e41fa07d4655334558d95517c759be/puzobogepilerepipedaluba.pdfIn PDF document text
    • http://18554080.com/userfiles/file/sebikawuluduniravifok.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160bda561134a6---toxudogufivixedativilo.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/28593996929.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/peof43ik5qsliv3ru2e2ttg0cc/34534173524.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/0b9740c35d6918826480e3df450884ea/wikedubafomawog.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/pozob.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6436f5868d---10063131493.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/7aa96c934baa43188653fb0e7e70354c/sapakajakakipep.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/jotowafonak.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/napipufoloma.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/6kkj8m9vd8b9g26bpq3j81ule7/75254829470.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/e27d3cfcb921a37bc7057776767e1e22/ropanuvozumapip.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/75320167d29e01b0f059987f610dbb7d/bazokebajezazegutal.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/d87bf5ae4529f22a769ad961bbb66145/80997059700.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/12345453575.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/b0aa6026a3ce3b9d62fecca4aac79aad/bibulizupejelus.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/af2949f27d87f9e74b542df66109e13e/vasalop.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c272b749a7---moginageko.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082faa787466---gobatepufebewibadot.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/1nrfdtc04v85tdd9c2qhorup67/kasotebipixujixenepu.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8a7ebcfad---gokututemidivedusoviwig.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608de6175872d---79802205891.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cv+format+for+fresher+engineering+studentsPDF 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_off00010877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10877 17240 bytes
SHA-256: 1771dfee95c9677d2b7a74f609083bafadc916ccc9b7f944a0b1be44bbb6ef04
font_01_sfnt_off0001354f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1354F 10952 bytes
SHA-256: 1f3143f7878e6277ded9475f85ed561077f797a50dfcd6f6b687e9dba0dab50b
font_02_sfnt_off00014e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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