Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62e3e221e3a0897…

MALICIOUS

PDF

73.7 KB Created: 2021-09-20 00:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 15a1541e53d877095ea7b52e7df532b0 SHA-1: 7bbd8888b7d21475a4fe030559ab545e3e36e8ef SHA-256: a62e3e221e3a0897d84fa88e4efa00b92c8a8f00527e0c23c027602ae5e65aba
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://xinyaoqiye.com/upload_fck/file/2021-9-8/20210908125105159897.pdf In PDF document text
    • http://termosystem.pl/userfiles/file/6022465630.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/rigisuvawixalivimorew.pdfIn PDF document text
    • http://wirheiraten.de/images/file/90566450071.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/labegowovuf.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/jodosojodiruxaxavodifaxam.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323b79a5550---73157928359.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/80173297017.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133b9f6defc3---82143603468.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/66289642286.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/xuruxemaru.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/sidepumapakub.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/49178428709.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/80905312639.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/84618321991.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/xovamuwiw.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/28192384019.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e28e5ba4e---52396056433.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/votezibedisesuroxakef.pdfIn PDF document text
    • https://flomogroup.com/upload/files/jajezofefo.pdfIn PDF document text
    • https://casaalu.com/luutru/files/pagevugeru.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ee9e0ebdc---lenorokiwelijumarelosur.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/16068482110.pdfIn PDF document text
    • https://dampinggame.com/calisma2/files/uploads/fikabitonunetasef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=tell+tale+heart+story+pdfPDF 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_off0000be1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1F 10476 bytes
SHA-256: 83d6611537adc4961ce1065df8da5976f7eda66dcec676cd290a83b5b76b511b
font_01_sfnt_off0000d61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 16604 bytes
SHA-256: 1713ba6066db24b4b3c55d1a8b6f350bb9792c7f1814840158eb0009d5300881
font_02_sfnt_off00010109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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