Malicious PDF — malware analysis report

Static analysis result for SHA-256 9386750fddbf5f3b…

MALICIOUS

PDF

230.3 KB Created: 2021-07-15 19:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 77ab2232fd53ad61805a61d35e0a62fe SHA-1: 38d4b997d20c401ce2b44369939495cd80bc8f0d SHA-256: 9386750fddbf5f3b4a5c4e3d361ea798eae7031558c657e3e7bb475557477c12
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress upload directories, suggesting it is part of a phishing campaign. The embedded URLs are likely used to host or redirect to malicious payloads, although no specific script was extracted to confirm execution details.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

Heuristics 5

  • 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.
  • 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://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16077a98340288---63526942851.pdf In PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/052da862fa1fc73616ff4cf8cafe1445/xajatavetikusogikis.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/vibezegog.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/97730830040.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/1c682c0f6a7d0a57a75a9bce844b41a7/jebijikixifuzajixokam.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/dowejab.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1020d01de---voxigigufojejo.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075847f3566d---24947156138.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/l0b0ji31ei26k7ophjtgh75fs2/bizifun.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1606cae446e2f6---tugugi.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/34e9aa0309b3c0312df4cfb71e2955c4/10380906976.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/patusopepotonafabomitonab.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f036492e6---11480235214.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/zomukifux.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/7120e18f8670ead060e86b830f125524/guwuboxam.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160823b69f285e---59031546506.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9351ae85d---88126730430.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b300a60e7a0---navujepeb.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5656d8b77218269fea4499dccff1b2fe/dazaritab.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/14442265936.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16090ba6da0b40---mopewewamamoboder.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ddc0c130f0e---wozalizijopa.pdfIn PDF document text
    • http://charivne.info/images/file/wugamemorugapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=gladiator+blood+and+sandPDF 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_off00032b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00034337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34337 10288 bytes
SHA-256: e19b986d8ae22f6e7e44a23bfc24bb1e834e16655aba322837b673763ee57e45
font_02_sfnt_off00035a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35A6D 18204 bytes
SHA-256: 7b2bb7a7051a60ad47c64c4416a157db6a6afaee564c6f4e444fea4d34b1a0bf

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