Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01cbf038dfefb50…

MALICIOUS

PDF

87.5 KB Created: 2021-06-26 07:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 713d56fe87577a0d9d6f15d82159dac8 SHA-1: a6f88b07cdddc4f634b47ba785952a7cb2642754 SHA-256: e01cbf038dfefb50fcf76696a4c6144439ddc656174a091c01df46b9947a8f9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cructi.ru/uplcv?utm_term=plica+removal+surgery
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160723a5f77c20---xamurapimafojawonoletemiv.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/lesuzinuxamotivagipuw.pdf
    • http://apsons.eu/files/file/58792991239.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/9uub2p5fkd4g4c4c2toikc6pcl/kipiso.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/d8def95f33eb5aa5779e128462fb20af/vikunuritajixev.pdf
    • http://arslanemlak.come/file/zakunekawejetazekudus.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e9564e628---40388432595.pdf
    • http://smartwealthhk.com/userfiles/nofasuwelurujotokifok.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d404c63752---56238565272.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891982b82ff---76629253634.pdf
    • http://kyanite.tv/userfiles/file/57257699436.pdf
    • https://wita.lt/images/files/soselijavobe.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16092b95bab0e6---22310000464.pdf
    • http://xinyaoqiye.com/upload_fck/file/2021-6-24/20210624144838759864.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078555a61ca7---87990654761.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/a7610db59ef1a726d509da6360d3d356/vutelamiku.pdf
    • http://madveras.com/ckfinder/userfiles/files/26693350395.pdf
    • http://thunderstar.cn/userfiles/file/20210515175957535069938.pdf
    • http://gostinica-domodedovo.ru/files/56935412946.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/01f9b181db0f7a9e3b7366b2533c3432/pajitazugata.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/81609122399.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d3001bbb971---82666821776.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_off0000f4f4.bin
0da74eae82be02c7e36298464464fd24ac1e05b3718f1434d977b609067d7ef4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 16688 bytes
font_01_sfnt_off00012096.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12096 16792 bytes
font_02_sfnt_off000138ad.bin
8517d1416877869f5b2669d58a04904039cf27c9fab04933203195bf526a496b
pdf-font-stream PDF embedded font (sfnt) at offset 0x138AD 10652 bytes