Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcefe8debc20ef7…

MALICIOUS

PDF

84.3 KB Created: 2021-06-25 21:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ed13d86a404747eea19acfbfc05b928f SHA-1: 0b83a333ff3caa9c9eed6b235951cb6ac0d9982c SHA-256: 1fcefe8debc20ef72c4b52fc95e11a5e17eb31191947ad5d3655016a737fb06f
164 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/4b44d6b33d6b997617d4f70c8bb64fa6/61790643706.pdf In PDF document text
    • http://blpest.com/UserFiles/file/60751759380.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f068640073---96690101566.pdfIn PDF document text
    • http://mchs67.com/clients/6/60/601da637195afcc8544498be66ee72b0/File/552582708.pdfIn PDF document text
    • https://tangente-mag.com/img/file/relemanamob.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/19d9c8a870ea696ca8dff8203840ba68/26525971938.pdfIn PDF document text
    • http://arablift.net/userfiles/file/8094924868.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/jvojdvmtnf5v6reo8itsbl40j3/29107430389.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/72363855895.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/j27b89rps1iecirmoghef55ud0/29528995981.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a669b925cd9---77451381408.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/zoravo.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/kusewo.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf88aa5624---wosuvibanivigijuv.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/f4107ae820dde6a25a9d1e640076ef4c/6313324465.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/lda0olb040u6leh5svr80j7u1b/tapokijiwileropu.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/55590301766.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/66673908633.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/fovetikurewunuseratujeke.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/0cf638d0f705c5539ddc1b851c0da53f/93767134844.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/560suulecl52a2n4kv91pj0m2o/92954725097.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/5af7d4da6cc8ded156764e5a5e6f2d59/vobederodesiratus.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/74931158877.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cbse+class+10+sample+paper+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63B 17212 bytes
SHA-256: a74ff32bffb209e872bc90959962d59f3a49a9a01663dece90880436720924fb
font_01_sfnt_off00011299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB0 10916 bytes
SHA-256: fd2e9e401edc92456ba1157185d292ddb813f8b7b9cce2737b58b6630671c868