Malicious PDF — malware analysis report

Static analysis result for SHA-256 347ee619271f406b…

MALICIOUS

PDF

87.3 KB Created: 2021-05-29 09:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9590db68552657d6706c36a0959ab6f7 SHA-1: 67772b4b4e8e2af1c95dff5486a73c7ba49279a9 SHA-256: 347ee619271f406b4f6c5110b05740369e905e7ec66986b4fa13b1c2d6518c1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading malicious content under the guise of a free comic book. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9446

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://lorofilmes.com/Uploads/ckfinder/userfiles/files/8025861634.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/509608ada0ea59755bde4367e4670fa5/nuxanuwesalob.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/da33b15e71f2f4b9cf3c30ca9ad89a30/jiwejagewuxejeju.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607495115a074---turokilovadelibivi.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/jm72rb3l18j05ol6fqf8qmng56/13501060121.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609834f78a251---jigejotemifamevusovosiji.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160946d24d95a4---fegadiwosagesitura.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609809b2bf22a---renilalekagetes.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a99b87abf---17991812246.pdf
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b9ac392f2---dozimijazif.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a06b842d189---61847774452.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/q1ubopj8rdoc18and4oavmme05/newikutilarawuk.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/c82a50a9bfbb3fdb325d4bcd8c154093/muposifezubomitofitoba.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/cd50c85e93fbd8e03294c031b45fbe95/nadegiwe.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3d22723e9---1483515296.pdf
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/cllmsdchbji0r75sc1se2af9i2/vumizujizufakowulexa.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/4lbolhrg2updq9otr08l27blhe/wuwezotepagokezotone.pdf
    • https://legouic-peinture.fr/userfiles/file/1746668917.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/42c22cfeb180acbab9389a674c76a75c/82150488577.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/16ff97f13641c4367ff121344d26357c/32297818525.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=t%25C3%25A9l%25C3%25A9charger+bd+picsou+pdf+gratuit
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011eda.bin
156e044ccfb6d731850a727e7e4ec7f6900cb505ccac45e112eb14889c6e8bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDA 5648 bytes
font_01_sfnt_off000131bc.bin
caf94e45071ef5450f718db0daae162802803298054dd56e88ba0466535c0847
pdf-font-stream PDF embedded font (sfnt) at offset 0x131BC 13768 bytes