Malicious PDF — malware analysis report

Static analysis result for SHA-256 477067ded137bbf7…

MALICIOUS

PDF

84.5 KB Created: 2021-09-05 19:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7956e34e5dba3ac153ec7648f3ce963a SHA-1: f4c4e15c4326f1313723760d1a1c8fd34bbce551 SHA-256: 477067ded137bbf751044239a64a551a16242a4a9de2d6cc7aabfdd344c4728f
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links on potentially untrusted or compromised domains supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://discovercefalu.it/_data/images/file/4193347172.pdf In PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d02ae8917972d283e5ed982c0667083/60363955243.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/sifozomivimojijure.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/45029341538.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/getigibo.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/wosonuxe.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/39461488741.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/fuzus.pdfIn PDF document text
    • http://hmed.vn/upload/files/55922489435.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/118d50fa9f54deeabdb7b19dad9c33f0/xoligel.pdfIn PDF document text
    • http://kanstm.com/ckupload/files/94184415462.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/mefazutuguzilimivorux.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210830192346.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df0ee547d21---73223035555.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/86850191072.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/02535471dd0e4c37da12b62d496ae708/10756093615.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/pixex.pdfIn PDF document text
    • http://rts-3.ru/upload/files/mizok.pdfIn PDF document text
    • http://capri.lt/userfiles/files/rusofa.pdfIn PDF document text
    • http://gdgom.com/upload/file/2107071723527211071tg44juhnx6u.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/45182280868.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/piwideluvefepegefokum.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/bamifeg.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/11636749624.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/mutuxut.pdfIn PDF document text
    • https://incasur.org/temp//files/28329688686.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/vewajifasuvatuvikovivof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=convert+pdf+to+word+editor+onlinePDF 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_off0000e6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AE 17848 bytes
SHA-256: f8f2f16f28266410d6c915bbbbd210005177228765b33ab759c65531b2d1f0fc
font_01_sfnt_off000114bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BC 10344 bytes
SHA-256: 78c24b0c2adde2b878ee2e855a2bdee345e0911a59b10c19b43d39c5d995b498
font_02_sfnt_off00012c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1