Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e26a96072d92173…

MALICIOUS

PDF

267.1 KB Created: 2021-06-13 11:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 55cc46ae2571f90460bde44e148cb831 SHA-1: 1d2733923eb960caaf422a7ffb1712d369a41c69 SHA-256: 1e26a96072d921737aa84a0154c426fd2f41dd620e01b3ce63df41f7b96ae315
126 Risk Score

Malware Insights

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

The PDF contains multiple links, with a high-confidence heuristic indicating a link farm pointing to compromised WordPress upload storage. One prominent URL, 'https://crysiq.ru/uplcv?utm_term=star+wars+luke', suggests a lure related to 'Star Wars Luke'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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
  • 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.
  • 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://crysiq.ru/uplcv?utm_term=star+wars+luke PDF link annotation
    • https://abandassociates.com/ckfinder/userfiles/files/daxirudanalugigovusom.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ba45f65d2742638f4f8ec8a37bc00d0/pubebifi.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cb7cc0eb4030450bab75ad369d3afd51/13942833664.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c15488bb3e0---93506511046.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/filajuzurop.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210526081754964.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/jktna52ledjds8t49bukh8omk3/wonofizobofozafopot.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/pilewokatid.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/23f1509568010b95f1b0b460dcbb1726/26578104745.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075a123aca58---sixagibebopibomejedib.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba312127bf59a76b3b679047d4f8d822/31605969245.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5e80aebcd---90910623082.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/uutn5lopq85ak2ed568ngeu8a0/68572947794.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae85f54bcb6---26006597875.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/65089650550.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/d3fd0f759dba65052f5b152d7d8a24b6/94664490460.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/a2q53l5hrqjtjb088hihldjin4/nukedazakonaliri.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1a70b946a---60839316829.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/sue93gvbsc2vo7n87b4j6pbhim/gibolafapimizuvamulofug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003cec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CEC5 4556 bytes
SHA-256: 819bcb163d766a10c3016721d155e45dc85f17f2ab97fa1166ebc8cc799ac89e
font_01_sfnt_off0003de58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DE58 14848 bytes
SHA-256: 6763f4c4703227df5415619f38d693949704682175d27d600ff06aad9b657fd4
font_02_sfnt_off00040d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40D50 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230