Malicious PDF — malware analysis report

Static analysis result for SHA-256 082b0d81d57e7274…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 03:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 20652b82da63f9b72cb896087fb7f98d SHA-1: e9ee70e18369a905e6bcd290ff79daad0a338829 SHA-256: 082b0d81d57e72740c3b9f665f9c6a166452e67b531bd9077814872c857681ac
176 Risk Score

Malware Insights

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

This PDF document impersonates a cloud file-sharing service, likely to trick the user into downloading a malicious file. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://pixomot.ru/uplcv?utm_term=pdf+editor+free+filehippo PDF link annotation
    • http://heydarbaba.org/resimler/files/sabozukuzujitubokutidedip.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/zifat.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/rg5ffa6dtq9eiuktlconv543u1/sakumutuxizi.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612da953eba6d---degimojibugarevabed.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/xejev.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/87078272895.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607badef02612---30236644857.pdfIn PDF document text
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/20749531747.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/39397801109.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/65288911711.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/sagifej.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad66556ca45---guxesinogu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160882ab204521---woluxetelipereduva.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202107022103591830.pdfIn PDF document text
    • https://clove7.com/userfiles/file/51989465855.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f93a01879---wuloxuwupobosepolun.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/25614087270.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/repaxovogop.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/74345073856.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/zewinagilipepenogo.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/77951505919.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6c0ec72a0---zaxarenetoxulamer.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/fd3d1e5745597b5f18d9711ae09482c8/71079223032.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/17301105469.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_off0000df17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72E 10160 bytes
SHA-256: 30d637b9d0af129dd4a3d2e77b543914693e2c9918dda0a7038809120b75cad6
font_02_sfnt_off00010def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEF 17168 bytes
SHA-256: 810b6355a938edd3478c823135a432af5a9d07a05b6614278277fcecc3e5ebbc

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