Malicious PDF — malware analysis report

Static analysis result for SHA-256 60306f385875fe2e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-07 00:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: bdb0eb1a60a23045e1317cbd72fd27dd SHA-1: 58e4c10b565c0829f518a3df455f0023f1ccb498 SHA-256: 60306f385875fe2ef5f8bcaf5adcfc0d866ae2f75cfd261ba8cfe7aae6d5e19f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the presence of embedded URLs and the 'SE_LOLBIN_RUN_COMMAND' heuristic suggest an attempt to execute commands or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://erfaspot.com/resimler/files/zuretizatawoweja.pdf In PDF document text
    • http://studiobaliva.eu/userfiles/files/18373612359.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/8072990727.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f0461216b20---89653933724.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160719838568ad---tofebatisegamemuw.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/zizap.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/e5353b47de900829d90f58e493feb6fc/maporinumobepa.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b939946a83c---47340111176.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/nezujidaxuluxitilo.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/a87a932f8a25b8406b53363808eecccb/84922228156.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/togawadofavotiviwena.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/kepupubego.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109070019235774.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/moretuk.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/riwegulajapox.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/dogumanuveluzan.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e0853d3fa---jeruwaxu.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111370616168---kozomugoxevulinozowe.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/95643699060.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/468f21c014ca620e6846b0d03f9bee1f/24375030250.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/4673478738.pdfIn PDF document text
    • http://klinok-saintp.ru/files/fifati.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=remove+manually+installed+nvidia+driver+ubuntuPDF 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_off0000ceab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAB 10876 bytes
SHA-256: a6915b55b0b882a2f9362d37e8545073e3b1fa2dbe0d17b00888b5bb53a979d9
font_01_sfnt_off0000e7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 17876 bytes
SHA-256: f89b1ee76b0c5ec20811a6c5ede1da0b7d7fd72580a00a36a4f55ca5a5617968

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