Malicious PDF — malware analysis report

Static analysis result for SHA-256 786b1f9b287d7ef1…

MALICIOUS

PDF

201.8 KB Created: 2021-06-30 02:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f97ae82c0c2b36ba2a7d31011595127d SHA-1: 8f1c3a526d581c24f13207e1980f5609141b4ad5 SHA-256: 786b1f9b287d7ef1174652bc1e8fc4488cd21eafebb324226fa73f00d6122cd9
126 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to host and distribute malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9707

Heuristics 5

  • 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.
  • 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://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/tse9kqv9rasljsv5g70uva58vu/rulifexagixugif.pdf In PDF document text
    • http://fygl.net/uploads/file/140852456468.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4173aa7c91---46228189182.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/gakesemubotufaf.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c1d144634---pularifejegiguxidon.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf090c3494---54344494300.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kapojufos.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/m2bikc2j9vmme1h19m14ifd7l1/suvas.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/39701531319.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f46d27c64---99738401264.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af00696fc4---97492862933.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/bf1ab2e6tspfek4beh5gs0vum4/97316557278.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6f824b78e---giwonumazekipa.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/4229ad994ecbe1146644a7211f35fd7e/43851399371.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a79321cce9---susemoxi.pdfIn PDF document text
    • https://isleo.com/i_photos/file/rederowupaj.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/nabafelinaw.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/91738221670.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/61839273748.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/k7c7q6h8qss8igvtb6m0v81uc2/vilufarusegejerija.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b19de36006d---41769975355.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/18197591959.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160784a62665c2---66751338388.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/75s56kfiso6farqsiv7ks9lp8g/77570020236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=external+structure+of+frogPDF 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_off0002b419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B419 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002cc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC2B 21012 bytes
SHA-256: 06f700fbe9087f92b896a001a472bca11bca6d09b86be2973dea69212d442bdc
font_02_sfnt_off00030153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30153 10604 bytes
SHA-256: ce0897480d5cfe6a164a80bd09781c3689f74f99d6c6e3e0379e3c9b1fbfcbca