Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62b04a30d934bcf…

MALICIOUS

PDF

83.3 KB Created: 2021-09-13 02:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d2a9047da5a132ecfd659c434ef60c0b SHA-1: faf0d7b5547a30e53a366b85e9245e6c8e93b9b3 SHA-256: f62b04a30d934bcf590acbc1909e7648ccaf8209d5088dde18f77282340a56b3
174 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it contains a download button lure and impersonates the Apple brand, directing users to a link that does not match the brand. While no scripts were extracted, the PDF structure and external URI findings suggest it is designed to lead the user to a malicious site or download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+can+i+draw+on+a+pdf+file.
  • 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 http://geerhannutpourreussir.be/docs/upload/files/mavovufodasujiteke.pdf In PDF document text
    • http://kimkhimientrung.com/uploads/image/files/23070613712.pdfIn PDF document text
    • http://ghefootmassage.com/fckeditor_userfiles/file/kapopapinenefasurafitazok.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/nawezumi.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/rajovuletep.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/gurulabasajasitobosujove.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/fidowowosup.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/tipuvidaduwapejeluvuk.pdfIn PDF document text
    • https://jecoexports.com/ckfinder/userfiles/files/70270010874.pdfIn PDF document text
    • http://svarovani-tig.cz/userfiles/file/20991388459.pdfIn PDF document text
    • http://skisun.it/userfiles/files/kekexolimawexinowexexupop.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/37868100504.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/zitadonu.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/dosijivopimotiwemu.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/wojolamuzovafanakupoluzes.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/45206972341.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/fofimofofolituxuladiral.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210908_085252.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/nopipolipoguwa.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/gajoguludofeze.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/xebarunefezodisetoziru.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16136163bf1c09---tevamitivusijofedud.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///wokiwewagejubebidujen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+can+i+draw+on+a+pdf+filePDF 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_off0000e27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 17724 bytes
SHA-256: ee66eb4ede76b728da3aa8db76610147c2bacfa05f79e9be2eba5de234e15e66
font_01_sfnt_off00010fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E8 10424 bytes
SHA-256: 0ea1e42b48a911108ebf0b388b23fcfa5f458514de34c0213cbe6d4c85c6cee8

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