Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee105eb1494920c…

MALICIOUS

PDF

166.1 KB Created: 2021-06-27 08:02:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 644d6c77c883e85fd6fc82ae14631dee SHA-1: caf7bb530b3f010cc03355ba574e54dff573c392 SHA-256: 4ee105eb1494920ccc04476babf941d034f8d6c846582807a36a7d384dea509c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9271

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://scmsalliance.com/clients/864514/File/75601642548.pdf In PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/54453a0dddcf5e475bdefd748bd65bc5/mesuwivufejoxirowebe.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160963c67dbd37---95703335104.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/15195240642.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608722cee8c4f---1158999459.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/77897251042.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d67b813e6---26559516892.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7cb4397dd---30171045157.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed70118206---74270196812.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/natikorojoranenom.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/zufevolesudovot.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ec388b3bf---wezapadejefititiwexa.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/tediboxizifovuziv.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a1cb13c44---50976893892.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160d05bf6b7ce0---1031045849.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/fubuteb.pdfIn PDF document text
    • https://baongochoa.com/upload/file/baseparitim.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/14405b73e3a90f45b552b7488c059e96/65780279190.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087e2ad6d5f6---walifobixebe.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/pelifizovibarebazukixi.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/2vdljn5819qkc0cjmic34k2so6/29777984796.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/195174921360a6eb24220c8.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/cb600615be354b19d99e093752945e11/xizumibelufupemiligukavu.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-12/20210512120517744964.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/69608211618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=gcf+of+12+and+24PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 120116 bytes
SHA-256: ab62959e6a79aa1bb224220eed486f1e61cdca0c33fa265095708d7ed6ec4e69
font_01_sfnt_off00021d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21D0E 15756 bytes
SHA-256: 6e1fd8c05d3bbf1f0159da89519fce01e9365973dba62b4739b99d491059b7fe
font_02_sfnt_off000245da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x245DA 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_03_sfnt_off00025b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25B54 10124 bytes
SHA-256: 34c991bfbf98f3c54d5f6a5eb899526af386fd72e1850195bc4ea6a6c61f2b06
font_04_sfnt_off0002722b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2722B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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