Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a488c972a01a44…

MALICIOUS

PDF

79.3 KB Created: 2021-09-05 22:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 612618d170dcd96c5207efd1c863022a SHA-1: 3c2a63d503e4b40dc6217c31414a3fef3742d7af SHA-256: 60a488c972a01a442b741ea7c871fe7af26d5934161e5cf61896e0c41ce5c965
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • 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://www.anclupnapoli.it/userfiles/file/fiketamixakagopikivo.pdf In PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/nuesl8gc42g23m2rnlnkhtenng/13197465345.pdfIn PDF document text
    • https://pecsikult.hu/files/file/bepixeretituwamabejabubu.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c4506080702---24327830784.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/8e490694720285e8ff279dbf5db3e4aa/82667127388.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ffd3ddadf9680bd74ae1d47b9c9d8ef8/49429785313.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/97947303658.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/0a8a4ba037e0c18a676f16cf5b3cca30/mozobanazupal.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/24436091660.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/bavazef.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/woxujudomowowawopa.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/23368955815.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/56179495015.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/11696962712.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/1098121361.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/43085272897.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3912c9d59f---suwedizafirenepitovunu.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/8412117923.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/96997047113.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/507a65371c6d1e90e1178647f4a6be57/mumenakokaxolus.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/85446063957.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/81996558927.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=amana+communicating+thermostat+manualPDF 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_off0000d25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25E 10756 bytes
SHA-256: 6199c9561bf78956096b923acd6c8a209544a5e11e70899d9efd8e8534b71a45
font_01_sfnt_off0000eaed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAED 17320 bytes
SHA-256: eeccdbdd32627e507bc145b0d2ade3c579ae0f0f9046f5dd1506e1ba29691a49
font_02_sfnt_off0001174b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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