Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a07b95c2fae749…

MALICIOUS

PDF

86.1 KB Created: 2021-08-03 13:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 20401b4b42dbbf2b1692dcf7bc8cb58a SHA-1: 32dddf8d36fed1e06371e4cd9be694c37d9fcc39 SHA-256: e9a07b95c2fae749434ef7b28eb1d3c80f1392c71128508e706305896cc61b48
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple URLs hosted on compromised WordPress sites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further exploitation. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d522528d959---24184890363.pdf In PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a01854f8d---8580828993.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/33316899535.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/13179630536.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bda6f8a7475---bomizabuturezebobuzogeman.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609473d0dd149---98828551677.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/c563daef1a6ed40041b14b8d37247494/52713695936.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/bifotumujibapad.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/59729694381.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/91045999121.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26773819464.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/94814634323.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ab7e957a0---10317504586.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/wufekixunar.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/27085406538.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160985f2fdeb29---48041614560.pdfIn PDF document text
    • https://ekransamara.ru/files/63382955707.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/vorepozoxiwerugejozonitud.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/3d19797f15926291d98725446fd97ffe/28008190645.pdfIn PDF document text
    • https://tantecoccole016.it/file/4319131972.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1609d1fcb---bilozedakawo.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/tejotoxo.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/zowubizinulol.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/kevalukopexiguk.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/lubufude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=mole+to+mole+stoichiometry+worksheet+with+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 16936 bytes
SHA-256: b2a5076a58e44fc05c4118949dd69beff7eeae42c64fb8c6894ed3fe03ba02a3
font_01_sfnt_off000119b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B0 10780 bytes
SHA-256: 5065042411ad0ee94dd8af12703e5494970ee104d60f607dbc300fa81bba4e9b
font_02_sfnt_off00013273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13273 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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