Malicious PDF — malware analysis report

Static analysis result for SHA-256 47736d6b067f2f57…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 06:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 65be5dd02f06794c2e87fd96d6202714 SHA-1: c419e04b1619db649a88ad11edf5c7cccb45da05 SHA-256: 47736d6b067f2f57db5a069d0726d5c010b4146e3b50bf37c5d138242a350499
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing lure impersonating the Apple brand. It contains numerous links to external sites, including one at "https://coretry.ru/uplcv?utm_term=fire+tv+downloader+app", which likely serves as a download or redirection point for a secondary payload. The document body is heavily obfuscated, preventing a detailed analysis of its specific scripting behavior, but the overall pattern suggests a credential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://coretry.ru/uplcv?utm_term=fire+tv+downloader+app.
  • 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://coretry.ru/uplcv?utm_term=fire+tv+downloader+app PDF link annotation
    • http://architettomontanino.eu/userfiles/files/sujixupodefanepojesu.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ogerexeluradir.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/95061032255.pdfIn PDF document text
    • https://novamakine.com/upload/ckfinder/files/vonapi.pdfIn PDF document text
    • http://kliknetezde.cz/admin/obrazky/file/33808347299.pdfIn PDF document text
    • https://ghnservizi.com/file/soxasasaju.pdfIn PDF document text
    • http://xn--5dbfbdrd7azav1bcx.com/sites/default/files/file/82275307338.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/18245054610.pdfIn PDF document text
    • http://unixsensor.com/uploads/files/202109141042435902.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/zagozitibaxivamun.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/puvimefulijub.pdfIn PDF document text
    • https://jurvamartin.com/userfiles/file/4782180540.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/lelobibotazikowamamadaxo.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/84666185227.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/11368732055.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/b8108df4d111bfce41d0277fe0b5eab1/xafukotukitaje.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614024209874f---99388484664.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2ec355c7b---bisitilasalosogi.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/36709532132.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/64147850795.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/lujipigukexev.pdfIn PDF document text
    • https://tahsindincer.com/upload/ckfinder/files/63358658750.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_off0000e711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE711 18348 bytes
SHA-256: d289d495aececbea37f82432d87ba739c225485c41443303ca4a754e1eef2c4e
font_01_sfnt_off0001167c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 10344 bytes
SHA-256: 9a0f4ba869acf7401360c114d9ded59b970c7611c5a729320b928e393ce87420
font_02_sfnt_off00012df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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