Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09a32f787589179…

MALICIOUS

PDF

82.3 KB Created: 2021-09-22 15:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2f71a482e3db2c4bc04ee1d8314c3a62 SHA-1: 0b1d3abf106b1c4324cb1379edb7b043d1075368 SHA-256: e09a32f7875891794d6176040e6191be2c5280643017855b8209324de837f537
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external links, some pointing to compromised WordPress sites, and a visual download button lure indicate a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=root+motorola+moto+x4 PDF link annotation
    • http://akicgiyim.com/userfiles/file/19157707115.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404b48189b8---vonuxumunafut.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/tasajav.pdfIn PDF document text
    • https://dienmayngalinh.com/img/files/depukitibevavuxovutonija.pdfIn PDF document text
    • https://advantage.ee/media/contents/file/nidikubudi.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613315715a267---golumodeke.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/66955905419.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/72732874628.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/kagerevu.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/tijisa.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/botofagawazowubovavamoxaj.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/30132883100.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/33619115159.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/6808017329.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/dopala.pdfIn PDF document text
    • http://rs-entp.com/upload/file/10681350129.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/moxodemajonaxaji.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/sesojop.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/25936556038.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/risebodifizax.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321080d1486---92124382488.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/53759881418.pdfIn PDF document text
    • http://intertravel.hu/_user/file/94564242627.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/42713313342.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/folepaverijadafu.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_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 17932 bytes
SHA-256: 884c4155a68e90f4cfc3f63c7909d5554dc26fb463e81130d2bf70bddd08f1e7
font_01_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12425 9996 bytes
SHA-256: d743db6c2078f07aeb0d2c7d8608bf898e6efe97393ce4e33f0d877ead9fd430

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