Malicious PDF — malware analysis report

Static analysis result for SHA-256 e701493926f05a52…

MALICIOUS

PDF

95.4 KB Created: 2021-09-05 07:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b0a50099d297b395e71b118cec24c777 SHA-1: 170ddf7f258f079275ac5a76555624b5b3bcf6a0 SHA-256: e701493926f05a52f9de6d2b75d9008773910f91bec3352db11dbf9bdd21b121
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate the PDF contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious content. The embedded URLs, while many are marked benign, are part of a broader pattern of hosting potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://xn--h1acbpobggs.xn--p1ai/data/files/tarazemagomabupojo.pdf In PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/48947158640.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7801653e9---kadilozaz.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/hnoeh7hkp8lo8uldfr5msr0a69/jisudexexanebizubezonok.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/88719843111.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/pagepodubez.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/89ff068d3684a0720d5b30083be6aa58/tejapukibezalulomo.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a9ba8983573bbea177af8d9a421a54d4/10512954251.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27a960aa55---vonanenuxetajodelaxu.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/genoboxazo.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b631dddc3---wagarirobabiroluzula.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/xanudu.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/63929153081.pdfIn PDF document text
    • http://vejwun.cz/images/25957739045.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788d3973ddb---60559068579.pdfIn PDF document text
    • http://krossinkeuka.org/clients/c/c6/c64aa726effa6776341672ea469011e7/File/59435648153.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16104d547edbca---zorumevegexo.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/709914275.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795c9841a28---gekixopubufovolafukeluj.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/nowoxapiz.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/30347f4dd8ef03d279f0799c468d5848/48400462579.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/63458677607.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=bushnell+v4+slope+edition+manualPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3bf2f194f1---wirulakuwuli.pdfIn PDF document text
    • 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_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 19076 bytes
SHA-256: 95d9c8aa200c61c299593b98731402c05edbe98fbf4aa88bde5937422cb1cac6
font_01_sfnt_off00013bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB7 11828 bytes
SHA-256: 086e6a3fa8b524425f896a9d5ed649637061e9d136e468b16f0d4b50376436df
font_02_sfnt_off000157e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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