Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa1730ec4ab7c1d…

MALICIOUS

PDF

84.1 KB Created: 2021-08-09 02:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 94b76c821d392399e0db89a44d1ca23e SHA-1: a7e77f38241de8d77fcb62141e15b55ca934d11a SHA-256: bfa1730ec4ab7c1dc0eed54065cfde522e9b233c9aec377a8190059a7867ef02
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into clicking malicious links. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba8da45d08---46337001704.pdf In PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b042172e5cf---nowopenikifateboxel.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/23faf045a7ee0b023ed3439e8ad118d7/sefubanomupufatiputokaxa.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/93405431624.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2cabaf04f---tijuposun.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/gizokuvoz.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/xoxerigewevib.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f22aff73f92---mulipalifuzike.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa32d1e625---tosileterid.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/xidosadikidipew.pdfIn PDF document text
    • https://isleo.com/i_photos/file/sefefoxo.pdfIn PDF document text
    • http://haphadoor.com/upload/files/46907511429.pdfIn PDF document text
    • http://ippon.lv/uploads/File/bapixerotateraxigumiju.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3dd02314e87f27769654553ed9d03958/tivifufejidavaborijugerap.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/zosove.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6d70ae5c3---simukorogubopudijowimo.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c935a6551df---53684940887.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607abfa52a03b---69339332234.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/91189754693.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/bubevefogulanukidevin.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c0b231ca5---58237473968.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607391cd07a3e---35518111615.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/wagimonavegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=kanzen+master+n3+bunpou+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 18128 bytes
SHA-256: abdcd3bca3427a41aded952ed8992bd55458596089123ae01bf51d709a27c63c
font_02_sfnt_off00011a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9E 2992 bytes
SHA-256: 63521bcd88b78daee0bbbb7b2cf0203709cb4980bf42cd768934da18fd308e05
font_03_sfnt_off00012732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12732 10984 bytes
SHA-256: 49fb4b11e5f6774db394fc072f8445c492699361a99b690aa80c8434d25c07f9

Open this report in the interactive analyzer, or submit your own file for analysis.