Malicious PDF — malware analysis report

Static analysis result for SHA-256 952f1775430dbf20…

MALICIOUS

PDF

87.4 KB Created: 2021-09-03 22:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ede93b8ff49234edfca7606ffcf3f6e8 SHA-1: 6c99528c28700b7d9ef064e2425e608e111cd4d2 SHA-256: 952f1775430dbf20f7b38c80d1faa8896c168c5a880ba9045228b7ae71db4a4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or are structured as link farms, suggesting an attempt to manipulate search engine rankings or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://thementalhealthadvocates.org/files/userfiles/file/69324030936.pdf In PDF document text
    • http://kayapaliinsaat.net/file/53898243615.pdfIn PDF document text
    • http://dzbnf.com/upload/file///regaxenitijemel.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210817040213.pdfIn PDF document text
    • http://ahchala.com/img/file/19675386928.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/jokifitisijudozizele.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2f0c94b5e---3949554227.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9e6074eb91050f7b30296048d68ca212/divikojizabaxuxomajalalob.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/sgrebnhj8gdamcaf2bhq7f0c28/29259621788.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/xazotedonit.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdc4e1f52a---dozigojuneworoso.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210625180831.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/puvezegaxeveva.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25128997046.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c744f746bff---81638597828.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/bcf95b8eda4ba2a15937f46d313d51ba/35417301295.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///14477939537.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/25224424772.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/44c983321161028acc53df443462d579/45626981899.pdfIn PDF document text
    • https://rumusjitu.com/contents//files/senatumeduderaboxe.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/6564302767.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f1496d7d0---bakuxulamozaravijam.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/rugepisomowurazexev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=functional+and+matrix+organizational+structures+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 11200 bytes
SHA-256: 6aa93a7e9eb1ddf070279e8ddd61b571677cc4291b8d601acd1e88e71ab19c1b
font_01_sfnt_off00010b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3C 17496 bytes
SHA-256: 6468031f8bafbf07eefd54c34ef894e4a60edfdab36f86bbd07ecccfec3a8a6f
font_02_sfnt_off000137c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.