Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c20602b37dab01c…

MALICIOUS

PDF

78.2 KB Created: 2021-09-19 00:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aca3730dbcaec0ac7a492912ee3f5e42 SHA-1: 762eba80bdd66e1a355f5cb54c60f1ae5c1c388b SHA-256: 3c20602b37dab01c4cbe47767de5e8ecc642f48ce721e443abb17a4e39071f57
164 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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://tjsyjdq.com/v15/Upload/file/2021910537449150.pdf In PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/27616557050.pdfIn PDF document text
    • http://silver1979.com/upload/file/90524023573.pdfIn PDF document text
    • https://khachsan295doson.vn/namthuan/images/news/files/79274843629.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d52b10185b---33011490051.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16138d0edda6da---rufaponufame.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef57980ea3---bijabamojatupobogif.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16132980b4d7b5---205194347.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/52067108617.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/biborusametu.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/ruvibajitagivedetafag.pdfIn PDF document text
    • https://luathoanghuy.com/uploads/files/kijitet.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/zanoxowerapujobosizewemo.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/gefesukanawased.pdfIn PDF document text
    • http://thecuriosityshot.com/wirojifisukiviw.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/sikegapedefidejo.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/92146128841.pdfIn PDF document text
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/vojoximab.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/togakadoderozaxur.pdfIn PDF document text
    • https://noelex22.org/userfiles/file/widap.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/22291152569.pdfIn PDF document text
    • http://medi-sen.com/files/files/mimuzidofikavenusuti.pdfIn PDF document text
    • https://matagujrischool.com/admin/imagetemp1/file/midepodogunaxigexepekogu.pdfIn PDF document text
    • https://reazfarah.com/ckfinder/userfiles/files/8071852101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=monster+legends+glitch+gems+99999PDF 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_off0000cde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE4 10816 bytes
SHA-256: 88e976b41eda6aa5a272946cf3b9e3261a66be5141c3e4c8714e9d40bd5f5898
font_01_sfnt_off0000e66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 17304 bytes
SHA-256: 9b590ae62ba45606b3f68963e1bde4173e2f6f095b8e7f0df5572b07af460f58
font_02_sfnt_off00011383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11383 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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