Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f49d64811e1eb1…

MALICIOUS

PDF

88.1 KB Created: 2021-06-27 15:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ae47ca040e4a8af80bcde3cfaa4b9974 SHA-1: 2f91e93068917665ca7ca229a73b3cdf23925a56 SHA-256: 00f49d64811e1eb1b2d5fc895024c26ff68c35131aa2d7809f8cea1612f7071e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, with many embedded URLs pointing to websites hosted on compromised CMS platforms, likely to lure users into clicking malicious links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/7ip59u3dtrhldc0s5l765mtr10/99599530199.pdf In PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/jopujavameledixaxe.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/tsob2l9kv5d7u402k2sfoud346/vapijefa.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/93395452067.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/659bd71d03a452bbe33300c7eb3968e1/waropodibamofomaxefuxeve.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/91176940730.pdfIn PDF document text
    • http://furniture83.com/upload/files/rinokibizexosexepuk.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/e4f425f5051e3e18c6fe0b83ff9863b8/zikonubewujiv.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/51078058734.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/81960161797.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/d2fbcb9db362afe20c6a6b9d84f2a296/wizusowam.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/20995937367.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/h5ul50c7otttrik47c3mqcaj64/36365292832.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d1abd7e8f---31908761446.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/61c0eb403bb6374415f283f9d9a15aef/wisiwujuloxigitube.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/56895027809.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bdb4c5479---25417408698.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08cc6a1e5a---34579075705.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b4bcc441d---98864641788.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/difome.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/54801839f9dcdedbb0c912cecb783e88/vajasusazaxodijuwufukunom.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/26c1f8394e3f1daad3f3311d477775e6/suxonojudup.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210623105057.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f901b22c1---97015157516.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/puxedadudi.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/99296221625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=gift+of+giving+bible+versePDF 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_off0000f66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66E 10472 bytes
SHA-256: 99fdf4f2c38d479ede8a7d660060c8c2fd317666bedcafbb867246a63cdf4d3e
font_01_sfnt_off00010e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 17236 bytes
SHA-256: 3b55c84e9c9e50215f88971d440d6965dc5066080d1311e7dddacd28ec13af64
font_02_sfnt_off00013acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1