Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92bce8409a0f27a…

MALICIOUS

PDF

99.8 KB Created: 2021-09-01 23:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f6ac26df2e65e2b6eeb9986c5700fb7c SHA-1: b68a4d1e1f7ba09f4c7742e42eac1e42d24004f4 SHA-256: e92bce8409a0f27ac25176a245b7047837360385c381bfd31fc1b90a1905bb6c
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous external URIs pointing to potentially compromised or disposable hosting. The primary goal appears to be directing users to external sites, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pistant.ru/uplcv?utm_term=best+troops+in+clash+of+clans+2021 PDF link annotation
    • http://big-blue-bus.com/pics/fotos/1/file/80522150953.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/sadejofosu.pdfIn PDF document text
    • http://freewest.at/75455498385.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/kevuxivotisaropasepel.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/u1s3o6bo97krav39sbe0rdr04t/texubiwuta.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/benimikibovavib.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/75182196503.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/35858275514.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/bifozozika.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/rejalewutapireviji.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/255500c1dc1a064bdedc617d5620ed5a/podobadunaraj.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d6bfed6947a7cb3524f5f17917a72493/2187137673.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/8qdgf0jju1o7nal8ub0poq6qa4/biliwamese.pdfIn PDF document text
    • http://azizolace.cz/images/file/32269946077.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/jebijuneporamafomitegeved.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/posimekujasifadadi.pdfIn PDF document text
    • http://spec-so.ru/sites/default/files/file/32300402042.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/sipewomofemusat.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fb048188b---77376717974.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210616_9FCC27E563688D11.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebfc592c98---26254088883.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-8-8/20210808200201147897.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f64c115b2196bf913a89fd61557dadff/fiwutekolono.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/7e3fc5ff1f491d9d5649d969d996044e/pezedunifima.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/43629034505.pdfIn PDF document text
    • 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_off00011d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001352a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1352A 19292 bytes
SHA-256: ab3380fbaa22c731b5cec948dc7505bfcbcfd912ecafd0e1ab4b4f1c6b7b232d
font_02_sfnt_off0001680c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1680C 10924 bytes
SHA-256: 77fcc7791d4f07cd5a344529d3465f9858bb9f86336869e01cbe6830f0733cc4

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