Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa510eed92fbfe2…

MALICIOUS

PDF

94.0 KB Created: 2021-08-27 16:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 88d135053422044578a27f5151c79531 SHA-1: 5bd4cb92ec86752ee6c81127c008370f4d9633a7 SHA-256: baa510eed92fbfe27381f07ef797f19b2bab68b2ccdb7659c1c501cbc749e289
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3357

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ketchas.ru/uplcv?utm_term=stand+by+me+music PDF link annotation
    • http://mebelhotel.ru/userfiles/files/joluwupukimofato.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/6ed84fe70b7173553720b068b0842be3/sodasisezudugokafob.pdfIn PDF document text
    • http://szwygs.com/upload/12780044709.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/kawogimatevitiboxasevogin.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/25709322100.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/66535093795.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/49437244620.pdfIn PDF document text
    • https://shinaltd.ru/images/file/49839453709.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/42318958543.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ba85db8a8---kisuvurogumas.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/dibogodanomered.pdfIn PDF document text
    • https://educhina.mn/editor/files/4364973854.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/96602508680d0e7494ba5751d4df478b/66942682047.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/folidetupavokiririmaj.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e39cea160---68363735813.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/34987244964.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/r2nep9ddc5jbbgufvkclqm8k99/39054668020.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/32014a2e7c1b07e484a1aebde6cee8bd/15791433998.pdfIn PDF document text
    • http://barexkft.hu/userfiles/file/31691713440.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/tunevefop.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e81558d05e---ledanirebokoxisiriki.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/229db2a1d1f369936fc696b519fff50c/simopo.pdfIn PDF document text
    • https://ehotelgateway.com/bot/ckfinder/uf/files/51373273440.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e6a2083dd---tajapixozofirol.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001488d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1488D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000160a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160A4 10692 bytes
SHA-256: e0de2f2afd8f71ae3a0a70d9e81af20855dfb890193aa260ad20d3baac4d1dd7

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