Malicious PDF — malware analysis report

Static analysis result for SHA-256 563bf2d5da13d3b4…

MALICIOUS

PDF

78.8 KB Created: 2021-09-11 13:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c0e201f3438a1477e87cc6cf6ed77d27 SHA-1: 322152a44fcd6edbf3555dde36799c36dc5ee19c SHA-256: 563bf2d5da13d3b47e692f5ba541b7092c08027150675b902811939a7acdf790
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to various PDF files hosted on compromised websites, including a WordPress upload storage. One URL specifically mentions 'adb interface driver windows xp download', suggesting a lure for potentially unwanted software or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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 http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/zavitapafomupar.pdf In PDF document text
    • http://thelifelesson.net/home/tappingchanges/public_html/dowalumniusa/ckfinder/userfiles/files/1098225476.pdfIn PDF document text
    • http://indyskischool.com/ckfinder/userfiles/files/bekelamesev.pdfIn PDF document text
    • http://jngf.cn/files/file/benuwobadoze.pdfIn PDF document text
    • http://minipit.com/data/files/48524236060.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306cea66a07---dafapejobokuwe.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/vidadomuxelumijob.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/38284442667.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132030ba134c---zipanikojedoto.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021091022290673499.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/kesewowajadowedifafefiri.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/wesiwopatorenomebiwowabox.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/nelejolisobiloj.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/fafijujete.pdfIn PDF document text
    • http://stisk.com/file/demetudonesodabonewezipa.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/vufekebapojewarelut.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/71745399371.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/mapevimajavago.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396ad055a40---farasuwazonuramedoju.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/12386007283.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/pokedani.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=adb+interface+driver+windows+xp+downloadPDF 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_off0000cf9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9A 10988 bytes
SHA-256: 18ff91fc5e88d0d707488ba3d349191585c42635c6da9ea323c0e485b570e79c
font_01_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 17412 bytes
SHA-256: d7f760e66b347c978d5f59d5fc99029157f55d3130302e14c861d2481b9e1af4
font_02_sfnt_off000115de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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