Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2215fb5557a342f…

MALICIOUS

PDF

90.2 KB Created: 2021-09-06 02:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8a6b4714f0fbb516b68c4f34676727ad SHA-1: 9017c4ecd9f7540768ce134e8823e26f15233b8e SHA-256: f2215fb5557a342fa5d39113a4904188eae316d1b1c10a629fcfbf10973f03bd
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or domains designed for hosting malicious files. Heuristics indicate this is a link farm, likely intended to lure users into clicking malicious links for phishing or malware downloads. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/l38d4b46ho75apc9fvdu98n9p6/lizisozozidigurebogimepim.pdf In PDF document text
    • https://gachbinhduong.com/upload/file/fisekinexosagukago.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/1kgm7dgfuuk5us6j59enl5i0lu/60366393390.pdfIn PDF document text
    • https://ocw.tw/uploads/files/megurabasuzoxiba.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/5848872480.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/jexafop.pdfIn PDF document text
    • http://hc6999.com/userfiles/files/47265538624.pdfIn PDF document text
    • http://flomojapan.com/upload/files/47515783270.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/90547512588.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/27327229587.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/91545038014.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862a533d547---60906882092.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/wutafixemo.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9478471c2c---nikomoxikuwinuja.pdfIn PDF document text
    • http://lws-realestate.com/userfiles/files/vifulek.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce9d83702d---88021121807.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/vitipowa.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/fimepovazakobijedekujisuj.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/d219eeee501d930d5ca96a1a498932fb/jepax.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/78732288004.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161255a126cc49---29252619904.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/depovavoji.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/votepixazekufedikijos.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a32d6967e---jozuto.pdfIn PDF document text
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/debilizujajuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=quran+pdf+arabic+urdu+translationPDF 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_off0000f758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF758 19788 bytes
SHA-256: 60177883324a23a9371c1d2cc1112014e99b60cbae6215ba913f9cf5f56b4049
font_01_sfnt_off00012a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A92 10780 bytes
SHA-256: dc69a92e22d8754b2a2665a3582fce115f475e6e3c7220c0f0eb0b8f44c19f55
font_02_sfnt_off00014352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14352 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1