Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a802281919ae2a…

MALICIOUS

PDF

84.6 KB Created: 2021-09-17 07:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: daa4d254893a99d87113b3a669d9554a SHA-1: 570c0ae31e725de57572c1cb719aa14a6e2d9479 SHA-256: f2a802281919ae2ad328b3eef0c8efdb299cf7999e8262f6e2a116f2c645597d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on potentially compromised websites. The ClamAV detection and the nature of the URLs suggest a phishing or malware distribution scheme. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user-facing lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3778

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=oxford+english+grammar+pdf+free+download PDF link annotation
    • https://smartcirclegroup.com/userfiles/file/zedorigow.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/91187252817.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614219bb48190---67646684478.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/podujadejevubufovemu.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/39052042579.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/degigevabelub.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4fb045282---25029318244.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/difoj.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/xojuwuvasisenafowujakan.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/89052015326.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/36372386645.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/81695279938.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613b5a541161b---nusutajimevefewo.pdfIn PDF document text
    • http://bochkari24.ru/pic/file/92932831097.pdfIn PDF document text
    • https://led7.ru/file/88544875327.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e499575f5---datisirope.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/pakosorititasamoluwu.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/pebolurapusiporez.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/27735129849.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/sodavagikukenazuwupapug.pdfIn PDF document text
    • http://cwesp.biz/upload/file/97349189261.pdfIn PDF document text
    • http://ilkemymm.com/image/files/ludokodetu.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/12051056975.pdfIn PDF document text
    • http://salt17.com/userfiles/files/49266788764.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/50122738520.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C7 11060 bytes
SHA-256: 6d2439ec7f0bdbeba0fac2d4dbd7887a97233524f575ba20d13a9d562bd7f01f
font_01_sfnt_off00011c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C22 18984 bytes
SHA-256: c630da596cd06edfc6d557264e6fd11dc27b3dabe792511018207e4983b2535a

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