Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb01af302fe8c4d…

MALICIOUS

PDF

77.4 KB Created: 2021-06-30 11:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e7481d477768f228884b050fb504dc3 SHA-1: 874a05976de64333307bd502a306418968c71d8f SHA-256: 4eb01af302fe8c4d93316c3055d1a6b27f88949a6eb8e26db32535b3691d4b3c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farm patterns pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs likely serve as lures to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://allytemp.ru/uplcv?utm_term=rival+is350+ice+shaver+manual
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160793910de7d2---dobizumowesuw.pdf
    • http://fogathajtohirek.hu/fckfiles/file/77469887987.pdf
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/vizorulugaxidarupofo.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f19a9f181b---29245892445.pdf
    • http://activesolutionelectric.com/images/file/gusitububaname.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712472d9c82---58133897139.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/l969empqk18h1785f9rvtjv0f6/76103729068.pdf
    • http://lapenya.cat/imgjovesnaves/file/51038807663.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2249a73e4---95965774385.pdf
    • http://kapelski.pl/userfiles/file/8852811447.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbeeaf2346---87965915844.pdf
    • http://agt.es/files/galeria2/files/75180751863.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7c5bd8546---36451845513.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a97351f33---fapetot.pdf
    • http://hasici-pristroje-eshop.cz/files/file/kowetuzemolixele.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a56f12d13---89773264633.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160767358c1ce8---15676027299.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/624a58dc9e52f55f07c0f9f90e04d5df/fomezamek.pdf
    • http://ecogestval.com/userfiles/file/sozuwit.pdf
    • http://mini-garden.ru/userfiles/file/jivexakotatusoj.pdf
    • https://by-express.com/upfiles/editor/files/guzibememebu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8bb.bin
70b5f73661f7460109d30aface66cca7a35daab37f741acb70c5a8a4a4056d06
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BB 10916 bytes
font_01_sfnt_off0000e1de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 16792 bytes
font_02_sfnt_off0000f9f0.bin
e405eb9edf3787e60cb750ce86558a21aa0a7fdc267253ce3fb44191d29597de
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 17992 bytes