Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eca4efafbbe8201…

MALICIOUS

PDF

80.5 KB Created: 2021-10-10 09:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5f1fca5329641692e2d2c4a1503387b1 SHA-1: cf87b579b2281c905ebe26b69f836b0d8d74c687 SHA-256: 2eca4efafbbe8201b6b78061223dc949beac8dc77230b1905a0a71943317ca23
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, characteristic of a link farm. The primary purpose appears to be redirecting users to potentially malicious sites, likely for phishing or malware distribution, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://infrive.ru/uplcv?utm_term=modern+names+for+baby+girl+starting+with+s PDF link annotation
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/86216057436.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/83u755mp0m558fmenj0ud8pdun/42193386708.pdfIn PDF document text
    • http://ropesadventure.com/d/files/94155384555.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/44624903008.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/91003520716.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/46369474620.pdfIn PDF document text
    • https://777mto.com/contents/files/57548797439.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/bilibodoxipive.pdfIn PDF document text
    • http://irths.com/upload_files/files/35510209530.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614b509456fce---gumomilojonuderobi.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/gikuparuzoforezanuwidatu.pdfIn PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/zifuvatos.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/66963828093.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/52f90610164f43b97cc7d214c2b0519d/47624307749.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/53781992320.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/gapizefizagegelom.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/4519509510.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/45964361924.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/roketuvawobide.pdfIn PDF document text
    • http://csc0871.com/userfiles/file/20211003052612_w3rp1o.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/winanugebekoji.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/41459887304.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/tesigulorixifiweride.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/xifudogifofefozirabafiwul.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/65854813621.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_off0000d396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD396 11136 bytes
SHA-256: 9cd17533a1f91764b0038f7d6a5566001dbc960465df145d35aa068a37379911
font_01_sfnt_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 18380 bytes
SHA-256: afe5fd62eb58ebc7ff8000a7b7fdea4d17fd9c79c9286e4eb15845bb5ff82d19
font_02_sfnt_off00011c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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