Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b7d0c4017c59a5…

MALICIOUS

PDF

75.4 KB Created: 2021-09-03 03:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 814afa35902c3aec11ea229a86c57752 SHA-1: 32e5080a8e5181ea42c4e30e7dd05064bbace46d SHA-256: c7b7d0c4017c59a5ea8dcb2f4c3b3adf5e32d01471e198ff03bb4751085ffc52
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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.
  • 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://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/246633776a54cf6ba5722754241d5754/49637288842.pdf In PDF document text
    • http://barcabianca.eu/upload/file/28221531938.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/xekipetokosu.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99346578033.pdfIn PDF document text
    • http://krikrik.ru/uploads/ckfinder/files/pigifavuvaguvibo.pdfIn PDF document text
    • https://digireg.it/upload/livuratesu.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/xanotaredaguramukedejozos.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/7kv349di5h5v6cn95e8b4huprn/62375048708.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd744a14d4---tegigenepoxotim.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/d69eb0a7ecde5f8cb77dd074b01b77cf/sipobaxejasufotozetix.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609862853a0a1---67805684028.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/o1bn67cq4rtuudo375jpjh7vku/mowamazelipagi.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/sogofed.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5068t1duvq61fbop3l0s31g5b4/99493824500.pdfIn PDF document text
    • https://onwater.my/uploads/file/96649958644.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/12950807051.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/28469809753.pdfIn PDF document text
    • http://sukhabalka.com/files/file/55429740865.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607278be35095---xifivopekefuxino.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/37714322444.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/49479297116.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/88064336918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=ctet+2020+notification+pdfPDF link annotation
    • 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_off0000c40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40C 17044 bytes
SHA-256: 8846cc46a85c7a6b2b0108acbf297eabbd4155f5784ae0cdc19e5158378efacc
font_01_sfnt_off0000f02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02F 10572 bytes
SHA-256: 5724bd27f0329fbc3c5509a417a204176e19f9d3c4f64865a291f1bb598024d6
font_02_sfnt_off0001087f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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