Malicious PDF — malware analysis report

Static analysis result for SHA-256 278bc30f884fe973…

MALICIOUS

PDF

85.8 KB Created: 2021-07-25 12:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7586a1e0cc6f0fea630c6c0cbc6f759d SHA-1: 27a78b74f7b3e6818a54a90647b428f3f4bf008e SHA-256: 278bc30f884fe973600bb6bcf217c27619fb5f7d797b8d9962ba760312f3af59
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple disposable domains and compromised CMS uploads, indicating an attempt to redirect users to malicious content. The primary purpose appears to be directing users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://agendaalzheimer.org/files/galeria/files/pulokozudogazajuda.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/08338a71bbc1b85eaea1ff2ceb03759b/jubudadoxulu.pdf
    • http://hnc2.com/userfiles/file/64017842682.pdf
    • http://condosworld.com/abisol1/userfiles/files/24932724296.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8cf80d02ac---250001171.pdf
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/vibenevalifafodagut.pdf
    • http://kqcme.yiaiwang.com.cn/upload/files/45723685663.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c38b11962e5---40257781023.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/933dcec11f21ab2a3737abfec46ddd7b/nimoxupeberijil.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/9deba6034875b3ccd5fdefeba4f731bf/70381565928.pdf
    • http://domeinbeverdonk.be/assets/files/file/69744240084.pdf
    • https://people11people.gr/uploads/File/rodopezoleminaz.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/f1fadb082a7708f6d10297994ca1ddfb/9355728210.pdf
    • https://turismoporsantander.com/aym_image/files/jenakunaliwemuzufitewes.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e397d2e715---mufefikozasalelafu.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609affa52725c---15986870501.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cc88540cb---14077655957.pdf
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/68006183413.pdf
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/zinidepivamozozubafo.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b67ae4341fc---94361896776.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/453e50812477979ddfec0876d66b73c3/83825815028.pdf
    • http://hasici-pristroje-eshop.cz/files/file/vodumododex.pdf
    • https://ewdel.cz/ckfinder/userfiles/files/30165078500.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=iso+31000+risk+management+2018
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e618.bin
9387f1b07f488a507705a3ea1b38b8ffc8607879ece2c90c95a8447beeb0dc19
pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 17812 bytes
font_01_sfnt_off0001150d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1150D 16792 bytes
font_02_sfnt_off00012d24.bin
a6051f6448ff7b11db46034b278a2ee1df8f9cd6e5370b16888745e96d3031d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D24 11120 bytes