Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e04138af2c6d381…

MALICIOUS

PDF

87.7 KB Created: 2021-07-14 08:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 991e63a4f6eb2fba461b6227dac60f52 SHA-1: c0366d1bc3fcd05a3dc3dc19633b134bb9a49b0a SHA-256: 2e04138af2c6d381f0aac567a330140882ba48d9f238ec3befe0acc781156f24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, one of which is `https://irlanc.ru/uplcv?utm_term=fifa+20+download+for+android`. The presence of numerous links to compromised CMS upload storage and disposable hosting suggests a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=fifa+20+download+for+android
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/a6fa593433d2251213f9f10646a4fde9/13094395357.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/i1bb6shpu0g0mk4kqqci45a471/bipudakaseburujogopama.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/e3f9a3oejn0918342lj0ro35il/zemewidijedur.pdf
    • https://eastmanllc.com/ckfinder/userfiles/files/pojogin.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607f07c7240bf---57717680634.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073015391d4b---21835724443.pdf
    • http://acecaalcoy.com/userfiles/file/xoxagupeforeretadu.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608771aaaea36---midurebawapatapisop.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1608517d5e29f6---13541792849.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c2971e65756---64282452853.pdf
    • http://meble-tk.pl/userfiles/file/jademidutawivumajoloxozip.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/p80ifabjj36vovogaqcgmqu8b2/25751583319.pdf
    • https://khonggiansachhanoi.vn/uploads/files/sopizenumi.pdf
    • http://galsabino.it/userfiles/files/14260590535.pdf
    • http://sxhk365.com/uploads/file///runisugozapotexexo.pdf
    • http://nousgarage.com/userfiles/file/dilego.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d5dbd8c43---fibegejirasumizemiwawij.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38eaec88cd---xanamimineduj.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a206de7459f---3963088280.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78906147e---72238395275.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfcfd3d34b---42276117827.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c100ccca53b---95077255247.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/f9fc4b595d2b15b7195f17800df32115/vosenutapibeb.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608f71f696967---zinaluwuga.pdf
    • http://babywagen24.de/userfiles/file/jenajazejunuzuxod.pdf
    • 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_off0000f64d.bin
56b804bcf545a1ca7348405b5f4458dba687beca450790b6742ce63852c0dadf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64D 10256 bytes
font_01_sfnt_off00010d79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D79 16792 bytes
font_02_sfnt_off0001258b.bin
d24bf1d84fe61404479c5f29a2ad01d3c66bf43f4ca488c7509e3a2212c723f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1258B 16900 bytes

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