Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cd689fced43cc95…

MALICIOUS

PDF

84.6 KB Created: 2021-09-11 13:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 07c91dae10cc4bfdea683f798f7e15bf SHA-1: e19611585a5fa8f378de6ddc3f272c234ecda8a5 SHA-256: 9cd689fced43cc95ee4ec0326275d1ab6d6db846cc82b6d585a640975cb36702
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of external links and the 'Visual download / call-to-action button lure' heuristic suggest the PDF is intended to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • 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://allytemp.ru/uplcv?utm_term=bleach+vs+naruto+apk+mod PDF link annotation
    • https://tourgardan.com/basefile/tourgardancom/files/93775895169.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a20af818ce---61177940883.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/13402198318.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/11036139914.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/dubaxitete.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/11616639957.pdfIn PDF document text
    • https://businesslife.com/content/files/1389205742.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/40267470482.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/werupo.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/solegofut.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/leteninotogusuginafav.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/qh56vt6droo8b716ktag6f79i2/82200311485.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/78971180036.pdfIn PDF document text
    • http://edituj.cz/res/file/fimogarujoxukupetu.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/bawoxoj.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/25678904725.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77160914299.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613680012479a---zadomujupakemigake.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/kabenofo.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/81653114476.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/67682572510.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26554609171.pdfIn PDF document text
    • https://jss-moms.si/upload/File/wumamixuxuvidiboki.pdfIn PDF document text
    • https://pindimana.in/uploads/file/14186710406.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/piwalig.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be71699623---1729034452.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_off0000dc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 20868 bytes
SHA-256: 18760dee1050215e07dd84363541783700b92a7705e5344f52382539280613ad
font_02_sfnt_off00012baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAF 10996 bytes
SHA-256: f2ab70ffefa997d176ea4adbf36c66a998f3aa1d22975f9a8c3d69ba0fea2b75

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