Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd6e098bf6357f3…

MALICIOUS

PDF

84.1 KB Created: 2021-09-11 21:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7a25254c73c3edb9054f6d56cac6490b SHA-1: 4d4ad2976063d38f2c4f84a34cdcb703ad7f7129 SHA-256: afd6e098bf6357f33e1afb9f045968e480e65e56bc724e83c2e90fd6f52090d7
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=more+beautiful+for+having+been+broken+123movies PDF link annotation
    • http://dichvumucin.com/upload/ckupload/files/94592157865.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/gopobazafozivazoz.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/monezubuludul.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/notavuzurabaz.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/3394187971.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/77687654608.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/16159436752.pdfIn PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/58218314781.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/kadirikew.pdfIn PDF document text
    • https://nycsmindia.org/ckfinder/userfiles/files/3622758857.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/49026107601.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/12836092403.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/94892322986.pdfIn PDF document text
    • http://www.terresdescaraibes.fr/file/55547747932.pdfIn PDF document text
    • http://learningkey.org/userfiles/34426630279.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/94338985883.pdfIn PDF document text
    • https://defi128.com/userfiles/files/88469097175.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/32414911238.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/nokuketese.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/37025671634.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/mewodedarawizasor.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/40365217084.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/13623952945.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/33358285561.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/fidodinujibusabe.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_off0000dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA5 18608 bytes
SHA-256: 7460e0c97f072b324af54447935c166c819cf935d33240a0ffd277dba96be060
font_01_sfnt_off00010f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12768 11396 bytes
SHA-256: 8d6294ebf5594ce3281096a56909e975cde9b1b6c93c0f937230b42c399aabf6

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