Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c999067f211ebf…

MALICIOUS

PDF

83.6 KB Created: 2021-06-26 03:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 589b570768b87d99aac79efc85a4689e SHA-1: 372204c4cce3b418e442f76db053204fb1dd7853 SHA-256: c6c999067f211ebf8aeac449614d4e774a910531128607906ce27c35b03b1e20
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. The 'SE_CLICKFIX' heuristic indicates a social engineering attack that instructs the user to press Win+R or paste a command, likely to download and execute a secondary payload. The document also contains numerous links to compromised CMS uploads and disposable hosting, suggesting a link farm used for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/cr2t2ctgluekmn8ghtu57747m8/denitesofixorepevixor.pdf
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773fafc50e1---18867093025.pdf
    • http://casier-a-bouteilles.fr/file/37921282873.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/0e437f61f6b5f3377de9d3b83bd847ce/wafafesakipirunixulevu.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/62866611113.pdf
    • http://tomaszfilipczak.pl/userfiles/file/39298511419.pdf
    • http://forter.vn/hinhanh/file/posuzovuxox.pdf
    • http://j1medical.com/uploaded/file/jemafuxise.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a669d54cd---29415514110.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/aecfef412749774080c038913997b3c2/7529116240.pdf
    • https://zahnersatz.pl/userfiles/files/19701656474.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ac6569f07---dogajo.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086e651dcd58---lubumagulanop.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/b12847cfbd680962edc959556698d033/8866450102.pdf
    • http://www.ecostroyservis.ru/File/bamisulekonenidiwemage.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/emeulmaof2vl2da8396emi0p9g/wezexuronupamir.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc9c9092b9---nurafiwunafosotozuxo.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd08814518---forija.pdf
    • https://llibreriaha.com/img/events/file/lamopapupisusaxe.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/564f13b0e369884cef64521bc84f4280/95725711150.pdf
    • https://asi-filter.pl/files/file/fasimuv.pdf
    • http://ferrocom-spb.ru/userfiles/files/84220615787.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=minecraft+ice+and+fire+mod+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0A 16792 bytes
font_01_sfnt_off0000e721.bin
91e0e86cfa3ede2c39731dc0f2a8b5127c6b4b9baec70f5059e7a52b8d3b8b90
pdf-font-stream PDF embedded font (sfnt) at offset 0xE721 10548 bytes
font_02_sfnt_off0000ff33.bin
a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 16064 bytes
font_03_sfnt_off00011443.bin
2ce6619b1ce45ac7328e0c87ae60d01d6e0615a91ca5bf2face68b83b8c7c351
pdf-font-stream PDF embedded font (sfnt) at offset 0x11443 16980 bytes