Malicious PDF — malware analysis report

Static analysis result for SHA-256 43fc217141a643f2…

MALICIOUS

PDF

84.6 KB Created: 2021-08-08 15:37:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a5c471e1aae59fd6d46cbb4c40ea2b58 SHA-1: b613722da4f7d9fc04f0efcfb52a9861d5866ab8 SHA-256: 43fc217141a643f22813b742d5df62268f1fa402cacebbe4460331fc4a666345
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to compromised WordPress sites, and one specific URL that appears to be a lure for movie downloads. The presence of these links suggests the document is designed to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=fury+%282014+tamil+dubbed+movie+download+tamilrockers%29 PDF link annotation
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/8je4r7r5ls5q3gpse4mk467emo/36086297428.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815912d1f9d---jujeroroseda.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09cf71e592---nazakemadiruvapoxipebato.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082594167ece---29905198181.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84048582238.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/96920527971.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/19284774884.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/7ad724f69429b92e150612e317b22707/ravuxuvaparoginerunemalot.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b446d06aead---15039865167.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///valosaruxilisofuj.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/pidurujulipupeb.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/xajaxakisuneluludev.pdfIn PDF document text
    • http://poorclarescork.ie/images/35972265917.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/99904054355.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/pesavutesumeja.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/basifejiramenaxefugejuzov.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecabbc15a85---xokerisuxinafukujixebuxos.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/8811811372.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fec38faf52cc357ea7389f3f25867e8c/7615551198.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/zesurozujuj.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/67445768144.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/93008346581.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/2827a1bd4bbde2f746d2826c8b183fe2/19702652393.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/34841649035.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_off0000e06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06D 11632 bytes
SHA-256: e6a44c15c313e4b73d9657d97dd2207bb445ca6d6e3b8e1af00f9e6a7171e584
font_01_sfnt_off0000fc5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 17864 bytes
SHA-256: ca8f4f2ed264ba31ecc6bcaf6d7a1f5021b8ae849400283af89a5d757f02942e

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