Malicious PDF — malware analysis report

Static analysis result for SHA-256 35bbb54f06213bd8…

MALICIOUS

PDF

86.5 KB Created: 2021-07-23 00:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b72b67d1a469f55dee86c0584cb94d7c SHA-1: 4e8b923bdf59f7b830c25d07dc1b7a30374b053e SHA-256: 35bbb54f06213bd8745fbeb51c27a2ff55112f885b0a6bb8ba9fa1d6a154980b
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal that the document contains a link farm pointing to compromised WordPress sites and a raw IP address, suggesting it's designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/givozidepewejosiwarodag.pdf In PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/28d636a8117e7f7656ca18994ab20f6b/xalubefugapuwigej.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/jogawederamojoxobopa.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2fb8d2fd7---satiwewemebek.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/78266318569.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210608_153615.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210602000339.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/topp04mea6ndbskl41npv8sv25/81008858947.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/48bd96fcaebb3d22b4995868882c27dc/munezurotemobizim.pdfIn PDF document text
    • http://tfforming.ru/d/files/6210481187.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c4f8dce0f---41919730867.pdfPDF link annotation
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ppualcc5gtevvufe39vc1ljf6d/17952333709.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a304f7cce64---wufulurulutixeru.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a858a8e5660---48360846535.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160873dbad2131---33596051489.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/21313451206.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/11184811129.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c538bc20962---beguzi.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/437f55655e20b12f9c60366e3693cea0/77649553496.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/b864a1c1b81006f6cb5934ef9e979f6c/bimoros.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/9e8964ae4dcdbd96ff85724985ba660d/bodizogejikago.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074aee94fb5b---73457701352.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/jumokujuvixixewemak.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/27113083048.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=computer+organization+and+design+check+yourself+answersPDF 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_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 16756 bytes
SHA-256: 6e63c3bc0c9930b334d7f5869560d6315ab3af095971aba1f04f3396a197dfee
font_01_sfnt_off00011843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11843 11552 bytes
SHA-256: feae9cbb1e2bf3bb8ce49c3bda5a599b72bd4f42cd2d61222ecd23c75c9cf905
font_02_sfnt_off0001336b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1336B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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