Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f2597c55f15a10…

MALICIOUS

PDF

82.2 KB Created: 2021-09-11 02:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4225109790ce69043ecddf556ca3ecb7 SHA-1: 3e631e786bd264977892d9c7e9d1746d747f6b8a SHA-256: 57f2597c55f15a10f027be3521761049ed72f648ecbfcecf738ba06cc8e79f49
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that redirect to other PDF files, indicative of a link farm designed to host malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a phishing or malware distribution attempt. The ClamAV detection and ML classifier further confirm its malicious nature, likely serving as a lure for users searching for movie downloads.

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://queure.ru/uplcv?utm_term=ferrari+ki+sawaari+full+movie+download+bluray PDF link annotation
    • https://tigaintan.com/contents/files/98632464265.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021091007431814.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/45317013677.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/50655882265.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/wefajew.pdfIn PDF document text
    • https://dennismaloney.ca/upload/editor/file/fovujef.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/welipaf.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/1285029693.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/tolapinudimosutuk.pdfIn PDF document text
    • http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/gekisubefut.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/jivexujinuno.pdfIn PDF document text
    • http://darec.sk/files/files/40196989970.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136687ca15c7---1610135788.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/32124440821.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/42116125986.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/sagewex.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/28244554381.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/guvozinagilazinixugiwu.pdfIn PDF document text
    • https://adikketiga.com/contents/files/84422155847.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/duferafaji.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/fknk8oa4c0qp8mkmstd1etl0vl/losalasotajalujex.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/tujeloloxarejug.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/sumetosuxani.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_off0000d7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E2 10992 bytes
SHA-256: 7b6475ec92a4e208bf0c3cc622490474276fa9a84845d0908d224ecd9e8a6361
font_01_sfnt_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 18864 bytes
SHA-256: 175b442824ca8cb026da8cb2cc2b3a5fe4229adbcf64b17d0983fc0d56a325e8

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