Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f233672b314e38…

MALICIOUS

PDF

95.6 KB Created: 2021-09-21 02:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fdf0018eeab448516efd356437b9c9fd SHA-1: b65778a9d162e651461de629aecae481a55edffb SHA-256: 50f233672b314e38725ff341f580b2b869db2f937ba087bc8b54de1d2ad5439c
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The document body is heavily obfuscated, but heuristics indicate it contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the 'Payment redirection / bank-detail change lure' heuristic strongly suggest the intent is to trick users into compromising financial information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://bizimpin.com/calisma2/files/uploads/19335480460.pdf In PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/pifag.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/13606283680.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/pakaxujoxawiwina.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408fb0476f6---60429791711.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/mojakuxivotozar.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/9f756d6f585d95845312e6c72a936398/63445365386.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/89cda3a4c9ed137294cb0de0f5e3e594/59424987773.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/9e08311aad8cf65491a5a262e586afba/mivopexonakupibobup.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/ece1f6055eb29142f7b422bc8cae3cc6/zadafebeduwejiwumurofu.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/44628704677.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/7agfulp6ou6pb0m3s7og860g4o/82713188732.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/gisureladapaxes.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/bisamarivilebixudap.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/24561953923.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/rve4bfhdl7mfkmv7pp69a9qkc6/30527519336.pdfIn PDF document text
    • https://ewt.cz/res/file/17901175844.pdfIn PDF document text
    • http://trieuduong.com/images/Download/25932228080.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/57951645468.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/masifudomomukibejet.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/66414512425.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/ponejojitozagukofune.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/tagiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=technewztop+keyboard+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_off00010ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF7 18732 bytes
SHA-256: 73aae3a7d64b86fa4ff5fcc15870ec23561068608802ccff91e9d4f43d87be92
font_01_sfnt_off00013ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFB 10804 bytes
SHA-256: d7f3aa47fbf0c9d77318e72023454a31070bf22a023dcfeb37b1b7dbf40aa2a1
font_02_sfnt_off000158bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1