Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a33d68441b95d6…

MALICIOUS

PDF

81.2 KB Created: 2021-09-10 08:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0d184e4945aa2a6d5ff9b0086f927c95 SHA-1: 092db50427810d5c01aaa6d8944d972a685e2191 SHA-256: a8a33d68441b95d6de150932cecc73799a925b74b756fbbcd72207c10d250d7f
204 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of brand-impersonation credential phishing, specifically targeting Netflix. The embedded JavaScript stream and external URIs suggest an attempt to exploit vulnerabilities or redirect users to malicious sites. The primary goal appears to be credential harvesting through a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=essential+anatomy+3+apk.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613aab9583f59---safurekuporudigopupedekax.pdf In PDF document text
    • http://ohappy.org/userData/board/file/pudipefefufugikimi.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/84690148715.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/fasawemuzawuvomudaki.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/5156012162.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/12819041869.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109020505029987.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/vibopipok.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/33429708305.pdfIn PDF document text
    • https://svltv.in/userfiles/files/bupepolulipibujasaweg.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/wugoxirakapuromerejelagox.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/fokife.pdfIn PDF document text
    • https://rumahbaruku.com/contents/files/64250610346.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613834dad7652---palimidenaletikazuk.pdfIn PDF document text
    • http://cserepakciok.hu/xdata/file/watogu.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/nebokajizurejer.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/42807960223.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/67082221307.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/bimeledawas.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/nejazazibemexiwek.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/49286384609.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/38727928710.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/erb45m3r9993j71m85soimbolm/juxilezezozeza.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210908215438554.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=essential+anatomy+3+apkPDF 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_off0000d913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD913 17628 bytes
SHA-256: 21f5937efb0756a25166a9c45fb5524930b14c86e3851cd399632482a39c1bdd
font_01_sfnt_off000106cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE3 10676 bytes
SHA-256: ca5400b677848aca71cd4805b4248cad54baa40037d2d52dc5b8e964cefe82ae

Open this report in the interactive analyzer, or submit your own file for analysis.