Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc115ff98cd71c99…

MALICIOUS

PDF

83.8 KB Created: 2021-09-12 08:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 55df0f5c5149c1ff9a67a7703c995b3f SHA-1: a8fc89fe9c2c15e26957e819779359471a9bcad8 SHA-256: cc115ff98cd71c9906a8c019a4c498bebbba37ba30f726f5ed03c87e47718fe8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous embedded URLs that redirect to disposable hosting sites, likely serving as a link farm to distribute further malicious content. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=mp4+music+video+download+sites PDF link annotation
    • http://ph-easycome.com/userfiles/file/21150169088.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/tokagu.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/50612796260.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/75369425252.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/roxekokapikuwotegawewomed.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/wasixobumizitawede.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/82005700915.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/vasalibep.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/42887525411.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/fununaboso.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/78487900056.pdfIn PDF document text
    • https://lecachet.fr/docs/files/13344222518.pdfIn PDF document text
    • https://palet-school.com/files/files/dopanoladut.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/145422615.pdfIn PDF document text
    • https://gdaniec.com/upload/files/rofasoru.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/72146583206.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/lenapodusumojalidil.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/94245f3a41f04088d6ae83df5b1778db/bunul.pdfIn PDF document text
    • http://ledins.lv/cms/file/demixexizujekug.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/53004385388.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/39928252686.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/77871298389.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/29166278895.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/seniwu.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a93b5a10278fed8500b399c5f7f591d5/naretutopesijesoridu.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/36678293410.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/bebezesabutenikifasel.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_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 10896 bytes
SHA-256: b145de121ba7a8094d7a24a299358708d9b403b3bb4347114db082bee9014183
font_01_sfnt_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 19112 bytes
SHA-256: 744d4bc03b0dedfd5afa59f324f2e7282f19f3c0849f52db1d54f628425f1e89
font_02_sfnt_off00012932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1