Malicious PDF — malware analysis report

Static analysis result for SHA-256 1872bad29ab00a7d…

MALICIOUS

PDF

89.3 KB Created: 2021-07-24 12:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03722e5f2669686970cdba8dc7f664a8 SHA-1: 1d91d3325cc3934954f15d2a0d9620b831cf2b3c SHA-256: 1872bad29ab00a7dc245933cdd3681b8984ce1223df6ba2b0e9440e6d18727d1
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The presence of numerous links, including those with UTM parameters suggesting tracking, points towards an attempt to manipulate search engine results or direct users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/119b4846a42f5b203299197f6c040222/71906272672.pdf
    • https://paperland.bg/uploads/file/soxukojefololo.pdf
    • https://businesslife.com/content/file/pimixomuzalajo.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8be079c6db---92819178010.pdf
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/sorilepagofufigenur.pdf
    • http://ud2-140.com/files/ruwozotetemiludarozonexi.pdf
    • http://backyardreleaf.ca/clients/6/6a/6a4eaaf8452764cb6fc14c9064ed0c71/File/bafiwenaxuku.pdf
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/ribilujimarowelesegoxil.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ca066650c81---52884451229.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3cb9c09fb4cf510e6e8483154ea8f263/32113324571.pdf
    • http://araonline.hu/uploads/file/dodurezomagixi.pdf
    • https://cochleartudaskozpont.hu/files/xexanuzitagepupugoveg.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/6cdad29d82fb9a29c9ba49842921b384/71266118529.pdf
    • http://sskj.pl/userfiles/file/97461367941.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/6c38e928c53b036fa6b19950cbe41a86/fipavuzosumujos.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bc61234a917---wejotakosodukofe.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/anlet6qvclq48483jsa8onvam6/gumanuzetoxalebijiwutobus.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fcfe19899---jawepud.pdf
    • https://ph2020.org/FCKeditor/file/80358135928.pdf
    • https://12waktu.com/contents//files/lejenebipamuloguwit.pdf
    • http://okzawidow.pl/img/upload/files/72785117774.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/efa726285f39abafb495a394f3fd2b52/91226594393.pdf
    • http://chizclean.ru/files/fck/file/52236381350.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080fed58989c---rufoxes.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=gta+5+money+glitch+xbox+one+story+mode+2019
    • 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_off0000f5c3.bin
a906e3bd6bcf999c0c1ccf11b86f7ee23a862359bae8f622f52710f90eafc236
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C3 11808 bytes
font_01_sfnt_off000111bf.bin
8b17018b7165211b9128604d3286503fdd2717a47def55a5cea743bd69e0d880
pdf-font-stream PDF embedded font (sfnt) at offset 0x111BF 17036 bytes
font_02_sfnt_off00013e3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3A 16792 bytes