Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00721f48aa1f6e5…

MALICIOUS

PDF

85.2 KB Created: 2021-08-17 01:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 04647dc6e7b28d98855734e2367660ba SHA-1: af8a28533406988b09c4aad4bee2d05de6f1abeb SHA-256: a00721f48aa1f6e5d23703cf1ed86bc31cf3a38e67741dc8547aea11711ecf1c
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • 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://josephlillianmorrisfamily.com/clients/59960/File/79879804765.pdf In PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073a37de3379---26340374631.pdfIn PDF document text
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/59137829806.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/44279319247.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/hdps03jaugs0uolt3j94grkvdo/16448236057.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/57300522014.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/2be907a7f363351890024614a15b4dd7/wasadegukumutizo.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/7306306773.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/5onv9i41isk01kioldoun7ct4l/pozununifa.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/775c75705ce878dc5f2e184db62e0daf/gaxasuvamuj.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/desukiwexitu.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/94ae27a3d335e1379f0d38ba29e1e78b/tawurifoxodep.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/bubibepoburivimivosi.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/41156013957.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/50c8f23b7316be56070cfa8709fe16ce/rizaxutedepusuxaj.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28c088aaf7---mesapobapetulawuseba.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/bixazaxarukigomariroler.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/688193c8a14f2f534b5d2935a82d36cf/savefadevesofavebevika.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/b1aefcf2e4290715b715bed314ed0ad4/48757539277.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/995c4de9dff24c5627f118dc0b4616ee/78919048492.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/28225261846.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/117b5c8b5a6b61f4177a53cb0ab9ed0d/84815331286.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/37187506694.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=baixar+o+filme+como+eu+era+antes+de+voc%C3%AAPDF 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_off0000e1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B5 11120 bytes
SHA-256: 53a8da3104bda715920a0c04c9346e750b2b38dbce5c4afd7f82babfc678be28
font_01_sfnt_off0000fb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001137c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137C 19220 bytes
SHA-256: 53748e890c423a6a153fbe17a4697cb4225b03c33df80c0fa263809dcebd9fd2