Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e7423b1109ad84…

MALICIOUS

PDF

78.8 KB Created: 2021-08-01 19:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 48ae7ef93e907fe28f64ec7a00a5eede SHA-1: 2b947107ba01b4cbc94dc3001fa82d9eb19d75aa SHA-256: 20e7423b1109ad8424d4c6fe36c3fe010699a89a0b1f55076751c07428607ab6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads or IP addresses, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the structure and embedded links are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/hcejq136uq6ef82rc98rf9g65b/zanojufugazekomabezuj.pdf In PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/hea988blugf2tl1qsivoc2qet6/22742312457.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a16b27155d---seridilirasutomux.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52a5169c62---wiromag.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/348875815.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f7b2e6a6a1a188a6dc28447a9d82c132/91120555652.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210728_110816.pdfPDF link annotation
    • https://siam-royal-view.ru/data/files/30893820678.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/1aa91078559a744365521dd9d90a5c58/13203409928.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/bolomopuxaxipopaba.pdfIn PDF document text
    • https://activepymes.com/pub/file/xowixor.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/dipozajagufituwesalijomu.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/83ebvgatee621t24qn4hilo0d1/dusikozukev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f522074ef7---69924122571.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d215beaac0---10372584883.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/a85b9dc1f0a4272d8008106fcd5cdd02/63606427009.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/bijebolutorepa.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/3070154133.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/pasaw.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/95324962498.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/pebapikogokusilalusuzavo.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/pigejugom.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607018de78af6---momikubebexojo.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/2620696001996a4d4e0240c69a94ac88/negatodoleverewufifufiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=examen+diagnostico+para+primero+de+secundaria+pdfPDF 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

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_off0000cc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4B 17664 bytes
SHA-256: 81d1427c7e2f9d0f0fd06c85622a467efc9d297feb5c2ce3d3cb27748baffbea
font_01_sfnt_off0000f8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FF 11100 bytes
SHA-256: c3199dbb9164270781cb25a4ec400f669f5a9fcdc65639a1df7a6c09e10c4db3

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