Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ac2be8a099d04d…

MALICIOUS

PDF

75.3 KB Created: 2021-10-11 00:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f15e901cb366b3db8f112dc2b401cf53 SHA-1: 2d3524b82e90aaf883c93be06b39ac5021a87cfe SHA-256: 08ac2be8a099d04d1ed5f94b66da5ec0aa0e5708e80b678150fa5871e373c16d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs pointing to potentially harmful websites. The presence of embedded URLs and the heuristic identifying it as a link farm on disposable hosting suggest it's designed to lure users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=dreams+about+holes+in+your+body PDF link annotation
    • https://study-abroad-travel.com/ckfinder/userfiles/file/rekewerakefedumobeg.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/38238993980.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/64958186655.pdfIn PDF document text
    • http://cdjuchuan.com/upload/files/mibonekekebivodorame.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/66329771339.pdfIn PDF document text
    • https://yodobashi-church.com/53331634875.pdfIn PDF document text
    • https://www.nickelmarket.co.za/includes/ckfinder/userfiles/files/38412763175.pdfIn PDF document text
    • https://suncables.co/images/file/60959064556.pdfIn PDF document text
    • https://nepalihemp.com/ckfinder/userfiles/files/85920190350.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/63071375674.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/zimejagitaboxa.pdfIn PDF document text
    • https://maisonforville.be/documents/file/wizofekuxadusupite.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/96604373622.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/81279372343.pdfIn PDF document text
    • http://keitbg.com/images/files/gefinexibemiwuxole.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/fipomidomijufa.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/36237851233.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613554000ed06---buronif.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/bomenodivasuvalezego.pdfIn PDF document text
    • http://tottazo.com/userfiles/file/gejizesosabikerade.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/161588987e725a---11631179248.pdfIn PDF document text
    • https://funbugs.ie/files/file/maralojopa.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/xedupemiponefifusedi.pdfIn PDF document text
    • https://5703n1n6999-6a55.com/contents/files/6485518010.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/lunugubuwatunus.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/guvilimo.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_off0000c6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 10868 bytes
SHA-256: ae98e50164eefe6f9df03cb10434a37269f19d871fd733801f0d82f0df262274
font_02_sfnt_off0000f7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 15656 bytes
SHA-256: 967a5b2c66468b46656b54ae1807a40e0b3165439dc0d62fb561b72d7e42feb9