Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22e160e8578c236…

MALICIOUS

PDF

82.1 KB Created: 2021-08-15 21:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 6e1f4305a9ac8e3b044480b8cbdcadf6 SHA-1: 8b17c3d5f1639d0be00e0d2d476a424a5176a9fb SHA-256: c22e160e8578c236111278c18757aad6d1f6355ee88bf3a4f7e495330db4855c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics suggest this document is part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://queure.ru/uplcv?utm_term=what+order+should+i+read+the+sword+of+truth+series PDF link annotation
    • http://parzenica-bialka.pl/userfiles/files/65753724729.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210514192850304420488.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52e84604a3---vibelazis.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-6-21/20210621043709345219.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/72269410651.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/58952505198.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a039012bf70---60265374513.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/f664f58632fcf20c27a23e57d60f67be/detosonujimifizajige.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/loubn68h4t2tmeu0ap97dfoj66/sibimif.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/64531624437.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/2cfcf0cd812c0aa6c823f17ebb233881/nivutit.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7911a705ab---91294214648.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160910177e7c83---60768127003.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/dd345ad7b304ab8308deeca587071eea/27605538488.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/268dd6e7eca0608343a10d0e2ec680d4/zezodovejasobosugi.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/sogugo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7972305ced---fodovemuj.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/cbd0042daadac021e9690ebe7accea89/26606206043.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/xizuf.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/tulunodavekaj.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ef5181f7d2a2d89ed86c2df786e1dcd7/raputawedavage.pdfIn PDF document text
    • https://aeap.com.br/ckfinder/userfiles/files/fugexuburalevelufuzerodi.pdfIn PDF document text
    • https://bfull.ru/uploads/files/nijibubifuvinu.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

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_off0000ddaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 10528 bytes
SHA-256: f4e08a6b53ac46fad4e96d64dba9149b4d37abce84687ccb5d3b3c31e136f601
font_02_sfnt_off00010def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEF 17024 bytes
SHA-256: 16f4089b2802a9d0de3c055c3a68fd360948e64328d45acc59f3a17c35585cac

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