Malicious PDF — malware analysis report

Static analysis result for SHA-256 90002aa093b36677…

MALICIOUS

PDF

126.5 KB Created: 2021-07-03 06:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54c8771c18b2b1aeee28168a44d07a3c SHA-1: 1a694f962a19039dd32c51a0fffe5a5c4f5e6ba3 SHA-256: 90002aa093b3667720b9760f9d6f930e592f2acda54b215b8174fb4e2599beef
156 Risk Score

Malware Insights

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

The sample is a PDF document that contains a link farm pointing to numerous compromised websites. These sites host further PDF files, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garmagostaran.com/Upload/file/migavexo.pdf
    • https://aneri12.eu/res/file/zivegukixokawovimi.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b488045edb2---bedizesebibasinagefu.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160760351cd7dd---30993316865.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160984a056b662---84226442002.pdf
    • http://amdind.com/userfiles/file/26925283605.pdf
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/xewamanusejeji.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/156a79011d7a9f1dee588d7c4272516f/77000302649.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160841010a1cf0---nedetirud.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/78b1db20c70357b01cbca73d57769c0d/dejereropuzebekij.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/7e7fbe30b5c6015a44f51086db17e99d/zalom.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/8519c7392de08558cb0c0e5c3d6910ab/78534126464.pdf
    • https://burgas-remonti.com/userfiles/file/32927204377.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b243e0a9e57---70959258062.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/b794udro97s5roaofi1tmkuv1m/91235463670.pdf
    • http://shippingengineering.com/files/ckeditorothers/tanikanonu.pdf
    • http://houstontca.org/Content/uploads/files/8917641781.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/3af2c04896033b4f98ab05e535c5d814/93746846526.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/8268fde5bbc7ddafa5ec05f96be82ead/81594291885.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/5f69103883e18477d81e7117fb8406a2/dibek.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/d5bo7t6svssl3kkv92l4151f63/83362099965.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a2e57a139---27406955133.pdf
    • http://gallery4walls.com/upload/editer/file/31694348070.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=in+the+simple+linear+regression+model
    • 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_off00018844.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18844 16792 bytes
font_01_sfnt_off0001a05b.bin
ba2bf22ce8f1323aada2436f699fb69023226ae4c78b03c3d6fb57315f8d9c4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A05B 10788 bytes
font_02_sfnt_off0001b8b7.bin
0b164ed426f38a6500c571340bb5a16d181970b694e6492e9941205fb38ccf9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8B7 19128 bytes