Malicious PDF — malware analysis report

Static analysis result for SHA-256 74993b164d3d0c7b…

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 11:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 650898424e1809464e0657684da2ef06 SHA-1: 6d66af41fc9e64ad58f7b96f7645cf6826b1f114 SHA-256: 74993b164d3d0c7be6aff618047c80adcddff28fb27419c511ada8728a1288ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=kepemimpinan+transformasional+adalah+pdf
    • http://cinebuzz.be/uploads/userfiles/files/wedivifudusitexalun.pdf
    • http://wohingltd.com/userfiles/lijido.pdf
    • https://smaransaving.com.np/ckfinder/userfiles/files/48767371232.pdf
    • http://ntvietnga.com/upload/files/22807287435.pdf
    • http://netpost.vn/upload/userfiles/files/tasoredisel.pdf
    • https://maisonforville.be/documents/file/tifuzasasujopaduvisebobak.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c8efec8c11fbe95b1760d56fe581e4ef/888172203.pdf
    • http://peak-experience-europe.com/images/blog//file/44492649255.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/b92eaa89960128b81d001e7e48370b27/mibexoviviv.pdf
    • http://taiyoaquris.cn/upload/userfiles/files/20210819151258.pdf
    • http://tamker.hu/userfiles/file/waruwobazi.pdf
    • https://avvocatoboretti.com/file/wetenoravoxodetuze.pdf
    • http://movementlab.dk/userfiles/file/vopenifexevomodavetase.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/71ffe8e39c5e533dacec8ebbba71c92e/46753441575.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a94a918ecd---7061500996.pdf
    • http://teormech.ru/teormech/usrimg/file/11288636081.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094ae3720e54---jorutitakebazatawamezed.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/35062f439f2f7a5c696c2a505780d74b/puweberapojozujux.pdf
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/48395551216.pdf
    • http://zulassungsservice4you.de/bilder/file/kiwoveliwibubemotez.pdf
    • https://preprodpcb.com/userfiles/files/68029859094.pdf
    • http://www.jokilaaksonratsastajat.fi/file/29279371130.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/79mpk5dh4urqlb90qqffmegd70/nenosupivunon.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d42d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD42D 16792 bytes
font_01_sfnt_off0000ec44.bin
6adf85454f4281413ac4d18c704b34f71df2009ccd3ead35b9e622eb10afafff
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 10752 bytes
font_02_sfnt_off000104be.bin
47132008a4307db8ce42b8d3a16f377e3b888096217ecf454c5e963f73681621
pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 18076 bytes