Malicious PDF — malware analysis report

Static analysis result for SHA-256 09662869cb729172…

MALICIOUS

PDF

90.4 KB Created: 2021-09-12 12:50:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0e7ff9fcdf6c5afd730f54888b62e156 SHA-1: c5893c51626802449348f9b3f41e4b5405e55b2b SHA-256: 09662869cb72917202ff371f5175decb1181965f9ede087b992a3f604c8fe4e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://wastran.ru/uplcv?utm_term=american+made+movie+free PDF link annotation
    • https://www.idd.no/ckfinder/userfiles/files/73139019821.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/jifovamolasawutigoxamuj.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/vegafatorolulojuzaz.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/pomevadasusodosinajus.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/veribexerapufadure.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/29786074210.pdfIn PDF document text
    • http://grabnerestriche.at/95814731547.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/31289882062.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ae8705398---sifasuf.pdfIn PDF document text
    • http://lecostationery.com/files/file/88519646382.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/fevotikojamegoxu.pdfIn PDF document text
    • http://sushibelovo.ru/files/54242298745.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/75757271506.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/96988257793.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/80579621476.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/59354799764.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/24947351887.pdfIn PDF document text
    • https://citytrafik.nu/images/file/tufem.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d559d30db0---44179453475.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/21462335708.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/nemabubaguziza.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_off00010015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 10372 bytes
SHA-256: 77404f45188c9c3efffbe765ee94f14fa487045033ed69c42a9a1b62be1de0bc
font_01_sfnt_off0001177d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177D 17228 bytes
SHA-256: 7bfa4aa2aadfd9c4639932f4ba0eb6eeaf6c504e319aaf2027f7692c4c35dd3c
font_02_sfnt_off00014421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14421 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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