Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ae2fb1db647a6f…

MALICIOUS

PDF

97.7 KB Created: 2021-08-08 19:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6a8176e6db75d52589fb8154674f75d8 SHA-1: 9ace935fa8eb9a5b76b87be052b3860c3692041d SHA-256: 01ae2fb1db647a6f8684d0c42f3cd65c6f718699353356ef07547137ce811278
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing a large number of external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV both flagged this PDF as malicious, specifically identifying it as a phishing or trojan variant. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest an intent to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://pistant.ru/uplcv?utm_term=national+high+school+dance+festival+scholarships PDF link annotation
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/815b0e549cf38ec3042275c91400c1f6/66135333393.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/kijuxiv.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/befiga.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa36d3075bd---matul.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/50496969428.pdfIn PDF document text
    • https://suprizpin.com/calisma2/files/uploads/guxanulepal.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/31387771440.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/93230856279.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/10206546783.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/609d62916626c0e4e3e6412445e82578/18765186819.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160820e63dbde6---61124838116.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/70562520338.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b515112724---vepaf.pdfIn PDF document text
    • http://ilovemynewstemcells.com/clients/865932/File/boxigabu.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16087a0e6c6aea---66631806896.pdfIn PDF document text
    • http://apnorajasthan.net/userfiles/file/94176017810.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/juzokujamifubitena.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/65a3a257a41b30df9cb8d36ba64e06fc/mivenafabepekowu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/4749fdf48629c785138eef74c235dc7d/53932114169.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/xunufipaz.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/6610716531bb7c8996efb04a226ba8a8/tibububizujavijum.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/90205058451.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d7c55658f---masusekurajugimi.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/9d2fckecii4dsmnupq9493mr41/libepekilixemenovafoviti.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_off00011ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000132f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F8 16936 bytes
SHA-256: faa919d1be3e8229cb2546c844226435d4209cfacf878458ec4321f99da61389
font_02_sfnt_off00015f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F0E 10940 bytes
SHA-256: 415eb8b9f592cf5aa1d92dce64ed51fdb9200a620e0fbae8201d4619dac9b701

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