Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f6d1a0a24f5e20…

MALICIOUS

PDF

85.5 KB Created: 2021-07-17 20:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1b8d679c676b2fb92d3081abe54e5c01 SHA-1: 379f768b9a883cdf0bbf43fe15e23b513779062f SHA-256: 62f6d1a0a24f5e2049bd1f74de667309f94bfbe718e2bee2767886621faa74ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress upload directories and disposable hosting. The document body is unreadable, but the presence of numerous external links suggests a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://kimwendelldesign.com/ckfinder/userfiles/files/63045691341.pdf In PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/33f48a8e6ec13bf4bd01071bf681c68f/fiwuxesopumatob.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/b6a539c1395bf7d30039d76d0c64d003/dadadoxej.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/jutejikawozibozazepore.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/59247060812.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/s8cn346giuihlflg57sb09legf/16507358420.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/80585090781.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/63554315526.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/kosebobirirukixo.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/82204191401.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ftm8bmgb04ig2chi3e3uvuognr/rezokabixawiretip.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/64qc93ircegronugq3h34c9as4/gagofuwanogufipuwezu.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/0313f392f050308d33df653e4c66bd9a/tedubefop.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/a7b723efdfd494b66cebef4fc628cbbe/97955951575.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/a38e9596f405d4b162ab31279732c794/mutuwe.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608934a34ebe2---92907963998.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9aa4ae104---63252350801.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e307b87e70c09f1ef52c954378ab2a6b/8805622442.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9137d5b88---10698614343.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/2cb7cd27caa8ee6e0f94b469c36f57ae/87619354827.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160828a78541e7---42761206416.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/38230797659.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a61e70b2bb7---doxavunez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=god+given+talentPDF 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_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 10260 bytes
SHA-256: ea3e924a68d2fdb344d8246e2c00fee0acf5f7581e4cb60635276715746384ac
font_01_sfnt_off0000ff94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A6 19540 bytes
SHA-256: 91230f72215c88e2b8e95ef7755f7d3f9674200d08f1da183a173091c112bdaa

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