Malicious PDF — malware analysis report

Static analysis result for SHA-256 300b18d10bfc1a22…

MALICIOUS

PDF

85.9 KB Created: 2021-07-02 12:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55113af60562262b9d5b52aed4949f66 SHA-1: a69f335049eed801f72dea6f38f14821ad1e71d5 SHA-256: 300b18d10bfc1a22617e9aee6e3b530c73c776fc345c16a2364f5eb4562b4723
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. The presence of these links suggests an intent to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://gamasteel.net/userfiles/file/segitizo.pdf
    • https://mm-podium.ro/userfiles/file/wesoridigerov.pdf
    • http://fertilityupdates.com/userfiles/files/soxogulipojowoj.pdf
    • http://breakevenpoint.pl/uploads/editor/file/12164468817.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/85aec0025cff11002afb7146207f017b/mejaxol.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3dddee2ee---63779549005.pdf
    • http://volamtuyetthe.com/userfiles/file/72715125098.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0e477e936---26945934520.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/6ecfcd740f19a32aa8e77f641619e56b/43892721342.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/3bd535cbf20a59a1dbb19bf796c171a5/3660007599.pdf
    • http://automsystem.com/UploadFile/file/20210510025734731.pdf
    • http://domholidays.com/userfiles/file/35831180673.pdf
    • http://learningkey.org/userfiles/16944208549.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/e1be0aa8d7a11b623e89baaef597e1d0/gobalisudokadelajarujoze.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16083262ac0563---patitobotamukidakunub.pdf
    • http://apexnepaltravel.com/userfiles/file/45645420445.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/1833ca7dea08053137b8d54e5c41175e/40039683855.pdf
    • http://assushop.com/userfiles/assushop.com/file/35811768180.pdf
    • https://adian.eus/files/galeria/files/18976247575.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086d465ca9fc---31024483878.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/s0rmh8afpflkkoihb3u0grglrq/30279823171.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b468889da3---50046578640.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a3a243c84---sorapu.pdf
    • http://assushop.com/userfiles/assushop.com/file/61432911160.pdf
    • http://pileshoppen.dk/userfiles/file/lukavuzinozusugide.pdf
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/d8197ga7a0drt6uek12svjbhv0/80036473882.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=best+substitute+for+gruyere+cheese
    • 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_off0000ed32.bin
75955a8b9f172b5429186b5da2bda649a67d55e7dc2489573cb6caa3f1e15963
pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 17020 bytes
font_01_sfnt_off00011934.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11934 16792 bytes
font_02_sfnt_off0001314b.bin
7272f971b7fc0449bbad70dead0e8df5017220b8966629da8aa68e4892199bab
pdf-font-stream PDF embedded font (sfnt) at offset 0x1314B 10712 bytes