Malicious PDF — malware analysis report

Static analysis result for SHA-256 80aad6844ff8c80e…

MALICIOUS

PDF

238.9 KB Created: 2021-07-17 15:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5bd09d9bb50c1b425a0d4acaf21f06c1 SHA-1: cfa2cb74ab89257a989a3e3f4110cd19ebfc5666 SHA-256: 80aad6844ff8c80e66856718b08c33b93e18062c2c2569f440b35630deb23691
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or credential harvesting attempt. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic further supports this, indicating the document is designed to lead users to malicious content hosted on compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9062

Heuristics 5

  • 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.
  • 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://mahae.hu/files/files/dujufanatusu.pdf In PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/sagegobineromixumozesu.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/0700140914fa558c7f15f2b86d952e67/pegesosameravonaludoko.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/tu00ae512ghlul0q3o91q4la0u/89668404261.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f30377f004---xapexinuweroveda.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/tugogu.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/46090381235.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/bojetonum.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210617153102971.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12675c0c70---pamaj.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/636d461456338e2b28f37a068c7711aa/44884459193.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/7b95c4e8d68c1e76d229234e0ccf1d12/70872724174.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/59731675238.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/956108757.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/54165202226.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755e7b3630f---30992597124.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a22c322abb5---gamarovaketagubusixiwori.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6f890b63d---godotosufep.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/sevuzikobomuxozegakus.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16095212a9a329---lavojujupufasizinomana.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/5c4bc3688fc9e6d909175b6382ce35e9/34833667370.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/66526612050.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/6c669e6fa69dc5b385a3db2eb3c1115f/xotomomiwilabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=icw+exercise+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00030b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000323b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323B0 16404 bytes
SHA-256: d520e49ed92da86c195b6f4e9bec8e00d8574a3d62bf189ebdfa0d9c18f003e7
font_02_sfnt_off00033a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A6A 8992 bytes
SHA-256: 3d21e70e749b212c37dd4a6491e9a7b4a5636772dc7b68ff38e99c6320d3620d
font_03_sfnt_off00035889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35889 24972 bytes
SHA-256: 09e9dae3f72e756c44de49b7b1e68b4bc4190f9e51a9f6e2f119462c77aec630
font_04_sfnt_off00039659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39659 10100 bytes
SHA-256: 62f21182488a3823366f97a1ceed41a1b246377ec3a292e0274d7a515e5d2c92

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