Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5e4bcc71e1e725…

MALICIOUS

PDF

89.5 KB Created: 2021-06-26 06:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4ab2403154b005bb2866ed25bbabe924 SHA-1: ab439fa265dadb56eb744317f1c523e35c23315f SHA-256: 6f5e4bcc71e1e725bf11522ac7e2d252599eddadaf559926378a47d7c786429d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating it functions as a link farm. These links likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://goodwill.pl/userfiles/file/74667789222.pdf In PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/a9e8c1badbcf5b4cc9dd403a03f3afca/bematakamuzidawevunaz.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/586417158.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/c968605e361cc9787f76cc1a5533bac6/59242970271.pdfIn PDF document text
    • http://bvsaigonbinhduong.com/uploads/files/tamiwinoboxakaridu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80727a8735---vigofebawawakeze.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/mazipedorogison.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/88d52igihh735vqolmorh1vpjg/wovotugakipevavuvaluxazin.pdfIn PDF document text
    • http://vietthanhstone.com/images/news/file/tinil.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608048242b3c8---55308746847.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/53b7d00848faed6e7506706321e0c288/fizupojugebidexurasulif.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/30455365897.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3865d89fde---gijimenoxadiwopibojiv.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e56264cb4---dalujinokema.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/2f67d9956abf699496c27f40904993fc/putipexup.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842b3e75ef7---pogabopapeg.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092521f7063f---bitiriwadiweda.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/87457342178.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/zujovomezijesaxajome.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4881f60668---57032605096.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/pf8e7393av9jg4vqhh7g85fs53/mijagalefumu.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/67176952465.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/74978747951.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fea886add9---dasat.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6dde35166---77035817526.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+rising+of+the+shield+hero+123moviesPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE703 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF10 3648 bytes
SHA-256: 388c0b60e183cdf8aff7c26ebac5fb3c023a36de779dd39ab1f6279f39313e93
font_02_sfnt_off00010d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D75 11012 bytes
SHA-256: 46a009a24c02ed9fc26c1ce9829bb079e3a0929d9a01e7cc41b1a551e6ee60eb
font_03_sfnt_off000126cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CD 20452 bytes
SHA-256: 8ff2b4f66e931b8c33fcdf00bbdb50b7de338cdfc27639e920002f308395ee76