Malicious PDF — malware analysis report

Static analysis result for SHA-256 147d7de454422f76…

MALICIOUS

PDF

87.3 KB Created: 2021-08-10 05:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e7c52894d32b37678ee26a99e28ae7ab SHA-1: 64751e761ff000afa1b5773938bac88dc5b5ecac SHA-256: 147d7de454422f76c15aa169327d875d206ed4cde4a2aa52ebd12842b26755f7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1553.004 Security Software Blocking

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of a 'Security Software Blocking' heuristic suggests the document instructs users to disable antivirus, a common tactic to prevent detection of subsequent malicious actions. While no scripts were extracted, the numerous embedded URLs pointing to compromised CMS uploads and link farms indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94552ca1ab---49228846879.pdf In PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610db0d4e2070---23210054863.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/bimuruxekedodanirojibav.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/jalofilopaxamu.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/5367359470.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/timapobinijotexuter.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/67651365305.pdfIn PDF document text
    • http://195exim.com/datas/files/xakakefijitas.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/72218134362.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070e360b6a69---9873466784.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5a333f32b---52413418599.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/93lg2mcta76pijf25grfm0c38t/ganibe.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ptecrpevmn9ggmhoqoj30nhsa4/88459802908.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba7412851c---sojebijokajogu.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/28745189521.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/6e37b248a7c55fa5b04c9f5634acbbc1/ranovelukukekizibepiz.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/86732455547.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160df94925d754---kasodamodisaxusijavekodof.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/34828360774.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/t42bckrchnup6alv1p0h5q9a4m/zujuvinirime.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcaf58c594---32115962976.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7a114fb7ecfbc010476d15b43542a253/71642138460.pdfIn PDF document text
    • https://csn-alliance.com/data/files/sijipuzuworizepimirafata.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/42834669010.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/70701456529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=wondershare+filmora+8+effects+packPDF 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_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 16872 bytes
SHA-256: 3f28bfe9a6f9d5340afb27b54ec77a3cff2720998885ea019b50f9b05ccaf7e1
font_01_sfnt_off00011cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13503 11180 bytes
SHA-256: 1a191b63ee96359a00ebb8091e4c9571298ec34b8a4dc0a71e30a9cba70381d4

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