Malicious PDF — malware analysis report

Static analysis result for SHA-256 602246ccaa07850e…

MALICIOUS

PDF

89.6 KB Created: 2021-07-04 11:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 041fdbffc538981fba03b70b1698c628 SHA-1: c1db586eada089ee1d8ead0edae87e2cd956e8f0 SHA-256: 602246ccaa07850ec10c3f1aa32d93b8d5c98b50c3d2f841a8739dc0770eccd5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d9edbbe93---bukavusisonafimibudawugik.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a5e1f24bb---55701903296.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b197574781d---lonixobudobiwovoriwa.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082aedd13955---titof.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/8lf8gmq8cjc395ievrrq1f1dp4/41911288305.pdf
    • http://beepost.vn/upload/userfiles/files/mefanetuzadolofipijatenez.pdf
    • http://rioairporttransfer.com/ckfinder/userfiles/files/vaxuvodemujugepadefegi.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702ea4199c6---firagigavawavufozugom.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d272bc467---71649448804.pdf
    • http://st-communications.com/ckfinder/userfiles/files/30630161732.pdf
    • http://siembra.me/uploads/files/74902285655.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607be1338fa58---60421807338.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f36f8b233---dobibadipagefazog.pdf
    • http://mobilesamara.com/img/files/file/65685356531.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/iqv85j18jcmhu0a4cnqngsvqk7/50822039861.pdf
    • http://bhs-class1957.com/clients/35434/File/tifugidisi.pdf
    • http://asustainable.com/global/file/kepegogisugikowe.pdf
    • http://celcg.pl/uploaded/file/pinafaxugibel.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/99bf5eb46de774866dc3d412b7c67709/499794990.pdf
    • http://wanyuantemple.tw/userfiles/file/81594261470.pdf
    • http://ahchala.com/img/file/68365873917.pdf
    • https://propactionvehiclesuk.tv/userfiles/files/26777757131.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/52ca7595ee67f963f8c1b118260096e1/47473548669.pdf
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lanukatinugetiwusu.pdf
    • http://aktifithalat.com/resimlerfiles/rozoxuvasiduvafolugikib.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bea32d7d4e8---71994633019.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/aba26160f2c178e77854970aeb052e12/nevebino.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=brookside+manor+lansdale
    • 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_off0000fc07.bin
12d75eb92bf9c3b47d3239a76654f5a811f313317dd54e2f203e5219acc0debc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 17180 bytes
font_01_sfnt_off00012927.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12927 16792 bytes
font_02_sfnt_off0001413e.bin
23000cce2b615b773b152b1c391c8fc9bf87cbcf0250e8ef951fa99f76a012c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1413E 10456 bytes