Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab3acc2199ab1c9…

MALICIOUS

PDF

79.9 KB Created: 2021-09-18 07:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b897ac6d1f0e7059e887365564607e74 SHA-1: 341f3b515222ce70abaf5ac5b0ca2d7a2ea53af1 SHA-256: fab3acc2199ab1c91e7e0e45696549acceea6a776f3c0356679ee89a652e490a
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, suggesting it functions as a link farm or phishing lure. The PDF structure and embedded URLs are consistent with attempts to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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://pixomot.ru/uplcv?utm_term=griffiths+elementary+particles+pdf PDF link annotation
    • https://typeone.com.my/ckfinder/userfiles/files/renesekuxotiwivujax.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/59476081026.pdfIn PDF document text
    • http://kodemari.info/data/files/34630451578.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/wizukijogofatavurozeregu.pdfIn PDF document text
    • http://noithattamphuong.com/upload/files/xuzaxilufore.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/nadojutexaku.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/16219441812.pdfIn PDF document text
    • http://fittbikese.hu/files/file/jilepiluxazonerore.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/vizisetinonomefikoxiwe.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/88622437669.pdfIn PDF document text
    • https://norservis.cz/files/files/16055010321.pdfIn PDF document text
    • https://viceda.com/userfiles/file/guvovipikaronodolotapa.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/sakib.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/65591944612.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396d7f07965---12107780904.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/2128541788.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/rakojisuxalilowa.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021090607512728.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/cqg9h66clbbp5r87dl7cnuvft6/gozujuropab.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/lojarakoxula.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/21158535845.pdfIn PDF document text
    • http://robfredo.com/userfiles/file/57488124358.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/vagigaluzuratomusabux.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/32926451744.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/detagowe.pdfIn PDF document text
    • http://vucert.vn/uploads/files/98011083377.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/57175321752.pdfIn PDF document text
    • 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_off0000d124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD124 10920 bytes
SHA-256: 3f023b5ff7b2c4cb1acf1afb81b5fca4d52a51f05708879fff0494f5069d2f3f
font_01_sfnt_off0000ea41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 18164 bytes
SHA-256: 553bc30d57d741a033d4b7cb5bc9eb281b125b85643324f66ea571e02913eb39
font_02_sfnt_off0001195c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1