Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5f0895dd61a974…

MALICIOUS

PDF

85.2 KB Created: 2021-07-06 20:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a39139978685d6537e88648fee7685e6 SHA-1: c123d2c31c67e54d2c3f3ee137072548b98b8999 SHA-256: da5f0895dd61a9742d165e766e78faaf0e1deb5f55a0b1348da87813433d54e6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many pointing to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of invoice and payment-related language, combined with the high number of external links, indicates a phishing or scam attempt. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://garglob.ru/uplcv?utm_term=purchase+procedure+for+manufacturing+company+pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/f5cfb4f776c89e793ecb33b8741b08c5/11927839660.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/mgegof8vhoe7054816ih4ndi04/vikekeb.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a523874427c---milazuvokogeluwuj.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/1cafcf013597d67394033928650f2fb4/rivulixijixolipej.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/oago98hempbf29dh82g2a9v2mo/tijoleferafaworina.pdf
    • https://weddingitaly.jp/images/file/labixi.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071c813cbfbe---52197335845.pdf
    • http://alkanboya.com/files/file///62479827111.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/cemshsqsmq6sq6r4be1564hd7h/kolusakaw.pdf
    • http://angarakshaksecurity.com/userfiles/file/15336510435.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/vie4p7esacp063vocno4ms69b8/kibujafogizegupedat.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16090691cd4e5b---53693339378.pdf
    • https://candbco.com/ckfinder/userfiles/files/75547468868.pdf
    • https://baohohoanglong.com/userfiles/file/17448684461.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fc73813fa026cf0a75684e8a3388ffdf/79012769939.pdf
    • http://www.siphonicflowmandiri.com/upload/files/89345205670.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/2697abc54cdf8b1127cd9e31ede1706a/sasexigezebano.pdf
    • https://betenenergy.com/sites/default/files/file/menapawafefuxukizoluri.pdf
    • http://halongbaycruises.org/upload/files/46964331001.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/da1bfa1e6e7074fdbb6e44101c538ca3/vuloxak.pdf
    • http://mbcasc.net/imgs/file/jutuwusafemed.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f998069125b943c17b532d8a28617659/faxegewajomef.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/25da20facb9987751c7c17377db15937/52570802626.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_off0000e9c5.bin
923bf6455e62f2eb4cfef59f06dafb882ff437f5aa7b317e977486e990b4671d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 16916 bytes
font_01_sfnt_off0001150e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1150E 16792 bytes
font_02_sfnt_off00012d25.bin
959671a14b3fecc0098e4a1a0dd763c5c0129dd69753b553269e284286f5576d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D25 11236 bytes