Malicious PDF — malware analysis report

Static analysis result for SHA-256 701e7ae278bc23a8…

MALICIOUS

PDF

74.7 KB Created: 2021-07-30 11:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5395d1d02f088f24370265fa6c1967bf SHA-1: 0382bdccb85efd397815e9a890c1fb9e1737fd1e SHA-256: 701e7ae278bc23a828082ebd25a632d8cd506bfea813844e9d90279f3068252d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/051f0c59e2370aa20ef83e2e5d2ca3ee/14741416346.pdf In PDF document text
    • https://classconnbio.com/img-jacson/files/46155511618.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/8uvu820ivi4af3t4ace4nmiom9/rivokodolunomovunosoro.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/67466388180.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/pezuwowagaf.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/25522814480.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/mo2jnji7elmi9ipqn8mb19bjeq/supujokizopolebenokoboja.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ajj1f8su65jnl16rmhubj3hngb/5499866458.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/zefemusibuvajewovig.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/famodikifo.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/nixasej.pdfIn PDF document text
    • http://bacviettech.vn/userfiles/file/68220628719.pdfIn PDF document text
    • http://sanphamhanquocymy.com/uploads/files/69107972369.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607479357686a---84681828215.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/3umskb2stjcod2d6db0f2jo701/tedaginusakiril.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/puzemijixikusumu.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/qfevnamtah31vb70nh8ar1nrrt/46152950350.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cc40043cf19908d883c8d63fbea28a7c/26504298399.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607001e8ecd4e---44690572184.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f16c0f4a2---9195745023.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/62895955586.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9ede14fc7---57655529886.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=lego+ninjago+masters+of+spinjitzu+season+13+episode+6PDF 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_off0000bd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4B 11436 bytes
SHA-256: 4439695d15373d4ee0ee7aa520f8da60bbf19758d5ee58f53bc6a315f89ff1ce
font_01_sfnt_off0000d828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 17016 bytes
SHA-256: 1393f63da45a34cdce28171490467d9096fb43f164b5384b9249ab7dc73cd541
font_02_sfnt_off00010418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10418 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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