Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c0ec7f314f0e57…

MALICIOUS

PDF

79.9 KB Created: 2021-09-10 23:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1c59fe22c45238aea08a4e75c307545a SHA-1: 7dd78fda28bf4f9aedc748ec923843f6982c78e8 SHA-256: e2c0ec7f314f0e57aa79bda8e739169cd55dd2f707300ab60f7ba3cdf0e277f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting or compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://infrive.ru/uplcv?utm_term=the+presentation+of+self+in+everyday+life+by+erving+goffman+pdf
    • http://cs-web-design.de/ablage/userfiles/files/77400737513.pdf
    • https://ra7a7p-h3ba7.com/contents/files/lawigi.pdf
    • http://studiosantomauro.it/userfiles/files/87742972528.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef237a5f43---xetowumolufunova.pdf
    • http://seattlebestteriyaki.com/uploads/files/43453960748.pdf
    • http://tehpromyar.ru/media/file/xerawojawowiramajada.pdf
    • http://ambvet-trefontane.eu/userfiles/files/pofalipimugiluni.pdf
    • https://tktravelkorea.com/FileData/ckfinder/files/20210905_392E338C0CD454BE.pdf
    • http://le383.com/uploads/files/laraxi.pdf
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/bowutoget.pdf
    • https://appchecar.com/ckfinder/userfiles/files/43239840966.pdf
    • http://studiotecnicoligioni.com/userfiles/files/buwipaxesuxulav.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b928f66010---guxosagufuxitozejo.pdf
    • https://kasihpaham.com/contents/files/disunozomunuti.pdf
    • http://ansonseatery.com/uploads/files/jamasotufinelapadatadi.pdf
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/seziwoxukitepinaxebev.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134d87bef672---78208925484.pdf
    • http://aaas.handyfriendship.com/upload/files/89462222132.pdf
    • http://interreg-ipa-husrb.com/downloads/jinuxijopimomefijemupet.pdf
    • http://sunnysolutions.it/uploads/assets/file/seduwilasisofixobegabom.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133ade35d6c3---74320269151.pdf
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/85429495948.pdf
    • http://sdds.be/userfiles/file/dojatenabekuwanedize.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_off0000d250.bin
c80e0eeee84d66f3503965abe66fef951ec2b934b9266d75f5f6d8eb96584424
pdf-font-stream PDF embedded font (sfnt) at offset 0xD250 11228 bytes
font_01_sfnt_off0000ec09.bin
6574c5b5827b18f796dd118ade8d9e184fb323a35860b3baf1495a45add76027
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 17656 bytes
font_02_sfnt_off00011916.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11916 16792 bytes