Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf2c09e1e0442dc…

MALICIOUS

PDF

73.4 KB Created: 2021-09-28 02:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6491800efc3cb1829142e863b9b05bd6 SHA-1: 1d68973b48f6b2a3f4f9c75c3c8a9eec325776bf SHA-256: dcf2c09e1e0442dc5d5b4e1fdf628844e1c4db5692150479a2ced1a9daa4b95f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document, potentially leveraging embedded JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://philabc.ru/uplcv?utm_term=newt+of+maze+runner PDF link annotation
    • http://qdjshg.com/files/file/85991506699.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/gasaboxevekepedemo.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/turapalarajelilatekoxeza.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/94324750644.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202191649105575.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd0a4525fc---44871207003.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/1577340672.pdfIn PDF document text
    • https://t2sc.me/userfiles/murozerizaxoxudalokefot.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/mutafasakixo.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/72227758411.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/tumuxolirotoxoz.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f2f0a74e6f---13656423590.pdfIn PDF document text
    • https://33mobility.net/uploads/files/72539416402.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/lopepamedewazane.pdfIn PDF document text
    • http://klenderbio.com/upload/files/34191782750.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/95188082455.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/segivomakawex.pdfIn PDF document text
    • http://vaynhe.com/upload/files/koxakuguju.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/30503936563.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/patodekexenarativ.pdfIn PDF document text
    • http://tischtennis-kiel.de/images/file/xekudumalejivaro.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/68130295999.pdfIn PDF document text
    • https://kstraders.com/userfiles/file/76642094625.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/xofanoxu.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393fc512f3b---55840830360.pdfIn PDF document text
    • 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_off0000b985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB985 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD197 18340 bytes
SHA-256: a11ccda017a07518ba04481a1273d2f1a20b3f0184f888646c882070e2fa5329
font_02_sfnt_off00010133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10133 10292 bytes
SHA-256: 467298aec0ae90006af038d30faa9f37898d473aebd3ce387595ee45ccb91a9d

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