Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0952c68f4b11eef…

MALICIOUS

PDF

70.7 KB Created: 2021-09-29 13:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0874f2f2184ed169b10cb9e91bba8ed0 SHA-1: 4569ff4734f426e3d13abfb1f9d4a368c2eebed1 SHA-256: e0952c68f4b11eef80911f82f625d867ec02050fdd44c9391774930948e7d646
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest potential exploitation or redirection mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/sagizipujexakup.pdf In PDF document text
    • http://lawfirm.vn/MINH/user_files/file/neredujikiret.pdfIn PDF document text
    • http://japhina.com/upload/file/10207519102.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/mipesofewokisakurut.pdfIn PDF document text
    • http://eurosolar.cz/res/file/8805397857.pdfIn PDF document text
    • http://bndweb.nl/upload/files/10799769361.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/27s065b642cc8ekld2dhohjue3/lavoxidekefiwowazabimi.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/1983226948.pdfIn PDF document text
    • http://abwrva.com/uploads/files/91946430041.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/58470444769.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/susatazutujola.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/44293885978.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/86da83bee15cbadfb0cbd93ffb6b92c5/newetudirupuna.pdfIn PDF document text
    • http://stonebreaker.at/71244025238.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/74171430134.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tapaxavazawizudalopu.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/htdhs8au20u06kefra7gq40gr2/69757677178.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/gezojomukalebigubagexe.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/97212189127.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/38595824199.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/52216881746.pdfIn PDF document text
    • https://sieseam.org/userfiles/files/wabukoroj.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mevovemipatok.pdfIn PDF document text
    • http://klaaswester.nl/img/file/lawuritugej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=telegram+for+chattingPDF 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_off0000b1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A2 17344 bytes
SHA-256: e439f607d565ea1d3f1ff4a7d70339d8bc090c0759ad5c7f703fa98a1bc41845
font_01_sfnt_off0000dd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 10580 bytes
SHA-256: 08ff7c8cc43c1b150e0ce343d63bb5a795c166f4459a1e74a1d59e5081884eec

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