Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c95965bb1a32a9c…

MALICIOUS

PDF

73.4 KB Created: 2021-09-12 05:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: edbfa90dcf75866a51d3d06fd77459bd SHA-1: 1c5bfc4e1257f4d65c1bf7a8b370c4667996c14a SHA-256: 8c95965bb1a32a9c521ba0d4af88a6c461a9041af46865fe3632d42e9a1ca928
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 0.9963

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://infrive.ru/uplcv?utm_term=cooking+fever+diamond+hack PDF link annotation
    • http://dreamsurgerycn.com/ckupload/files/zonavevinikiw.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613196d4bd9bc---ridamexor.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/tuwokuxevogarilaxofur.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/64375218463.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/seveloramulirasexujuwij.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/kijepusejupumikanid.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/watunabed.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/87114772136.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/39222882790.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/kixod.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/vifoporugelomijape.pdfIn PDF document text
    • https://casadko.fr/userfiles/file/46802185636.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/83200740632.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/16479956663.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/51094838140.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/24095260623.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/30597284280.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/60961604532.pdfIn PDF document text
    • http://cityfate.com/files/files/tulatutemazivijedotibus.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/vekobunifexona.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/63513205409.pdfIn PDF document text
    • http://infosierra.es/images/editor/ronuduvowudun.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_off0000b9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FE 17784 bytes
SHA-256: e364579a44c8e2823f3452c28b7e568b8c935ddeffb71f94b5da56ab39f629cc
font_02_sfnt_off0000ffd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD4 10800 bytes
SHA-256: 59bb183e406e4e41050cec75b5a53c05c1ea911889f4ab42bfb41e30b2571941

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