Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbeb17d8ccc2ee1…

MALICIOUS

PDF

90.0 KB Created: 2021-05-29 09:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e27678ee4064e482ac96b7be5fa2eccd SHA-1: 0a9e07ad4aafd138c648f96f1ff387f79e958502 SHA-256: 7dbeb17d8ccc2ee1e1929ba2449f23a32a72c8c75e441ed83602380412551480
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious files or redirect users to phishing sites. The document body, though heavily garbled, contains text related to downloading a free PDF, aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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