Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b3034c98f9a697…

MALICIOUS

PDF

84.6 KB Created: 2021-07-01 20:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cdac0d5d72373121555740b7bc3a2060 SHA-1: 9bf87514643e7815eaa1befc94d17c18d9f5be65 SHA-256: 62b3034c98f9a697d8065cc0855f83e5e14dadafe5c507155b36500d5dfb49df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of compromised CMS upload links suggests an attempt to host malicious content on seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bikidi.com/UpFiles/WebEditorFiles/file/jomifik.pdf
    • http://pelesiuvalymas.lt/i/File/11848352945.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc685a179c---63797301255.pdf
    • https://campermagazine.tv/public/file/35347818063.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b742c5ee4d---98664325381.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/94eec52dd53c35fa19598fb52c4e8a7d/87579987279.pdf
    • http://fonnepal.org/userfiles/file/71963446620.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/af8a37f4fae8e39848d5e353f8db6b81/kasudazakil.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071f32c2d192---votofiwuzodikejoponawo.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aec1f161c2d---88817757397.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096551909f22---1779666347.pdf
    • https://advantagelic.com/singhania/downloads/file/54971662360.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f49dccb58---31081843132.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/loxumubabonenuketuj.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c918e607a6b---kumasibesagalokunofutikef.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/1a3c3ebee6ed4b77a9166bacd150b955/91402016992.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/6dd070a77f5d8fe80026f332b0e02f28/21102889739.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc8a45b0f9---mafajasamonuxapofonibo.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/7eed6f73eea9779a04b8eac2ba764aba/54458818299.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=concept+of+working+capital+management+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_off0000e625.bin
2ab03764b399dd4dc074b37b137cf10d09566a9e053f239350db8a30f23a2c45
pdf-font-stream PDF embedded font (sfnt) at offset 0xE625 11004 bytes
font_01_sfnt_off0000ff91.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF91 16792 bytes
font_02_sfnt_off000117a3.bin
99704359340ccc531ef112a233366f0d1ac8aa2c37ed2a8cfd662f00d0a27835
pdf-font-stream PDF embedded font (sfnt) at offset 0x117A3 17288 bytes