Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac68e50b50b30d3e…

MALICIOUS

PDF

90.0 KB Created: 2021-09-12 05:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 8fd862d024a1b90d4de3493c707fb9e7 SHA-1: 4d269fc1860ba2fcb387abde47ea02c693c09800 SHA-256: ac68e50b50b30d3ea68f05fd976d69f9e5882fab3e0e16545d2f45d9069ba980
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 0.9942

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://laborke.ru/uplcv?utm_term=which+is+largest+population+country+in+the+world PDF link annotation
    • http://acutecardio.ru/sadm_files/mejilokinanoj.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/zuzugebamaw.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/317953e55ef703cfdb849101c4abb02e/rekaboxaronovadogewa.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/vufepufiruzo.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631406607.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210902130814610.pdfIn PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/72723837814.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/8180791509.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/lotodisawinimixomog.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/murovo.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/83906910931.pdfIn PDF document text
    • http://speckrepej.com/upload/file/depasimisavajijemoda.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/44461284725.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109040446242026.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/dimapibif.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/miluzuvivevutapofi.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/gijilajozukotexurusuruji.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/wuwugaxovapufize.pdfIn PDF document text
    • https://network-italia.it/file/94433283612.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/gabukedilevozazim.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/fomipigelarapikesi.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/24136971483.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/91802221223.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FA 11088 bytes
SHA-256: 9141c0d77b131c1433f85d32d335aecb8e753f0bd4977d1f960f6c4a8745c4d1
font_02_sfnt_off00012ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA3 17596 bytes
SHA-256: 10267713bd768e4c66e02b477edde8f881a4a0de301e220e3dbf9da81f92d8db

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