Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2901677d022033b…

MALICIOUS

PDF

80.2 KB Created: 2021-09-09 21:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: 0ea30575734da5328545164937749a44 SHA-1: e0bf8461c42ed4b241ee77b7b4ac2334ad839bb2 SHA-256: b2901677d022033b25549881068376985232392956674e2d4f1354768b9ab3a6
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 0.9977

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://ketchas.ru/uplcv?utm_term=cara+menampilkan+aplikasi+tersembunyi+di+android PDF link annotation
    • http://thaimassagemodel.com/ckfinder/userfiles/files/25619691036.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/88921855290.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/gabirinasewarodagubovusux.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/88331454396.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/23650188097.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/dukakebag.pdfIn PDF document text
    • https://cooperadora.grupocreartel.com/documentos/archivos/95710966302.pdfIn PDF document text
    • http://chiron-ventures.com/chiron/home/img/upload/files/2109061155400026351f5gk.pdfIn PDF document text
    • https://themalc.org/files/file/zinixudavazawemaluva.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210906_205353.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/jevoneka.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/vafapifimafuginibofame.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/munalupag.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/xapenovunekukavonifogunoz.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/wigetolimabi.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/wegagapujuxijekobu.pdfIn PDF document text
    • https://mallarpurnaisuva.org/go/file/redudoguvozaxorijejag.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/radiligomowifojutololuto.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/71256484832.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/telopegibadijok.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/bofezo.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/98337507118.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/10580057906.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_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 11028 bytes
SHA-256: a4c62f2468606b404b976e23810b091b1eff18ee7a8031152a04a1bf4fd5e80b
font_01_sfnt_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 16584 bytes
SHA-256: 1df079750fd8489e7ae2a1e7380b9ccddb97685dd43cedadd81c4fcde8a2ae0c
font_02_sfnt_off00011aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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