Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a22b0f3663db59…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 06:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 1d216b107953c26e360c38211c7f8c3b SHA-1: 2dff618d8921117ae392839e09dbd84b9a473691 SHA-256: d6a22b0f3663db59f79ff17ce195a743d26cc7349a9dbbbdc3857b8653f4c097
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://wroclaw-effatha.pl/grafiki/file/felagupujusorive.pdf In PDF document text
    • https://hoanghaie.com/Images_upload/files/fewovewebususadobiluwi.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/53719421443.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/44155867558.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/16166873847.pdfIn PDF document text
    • http://mytrangroup.com/uploads/userfiles/file/gevepaparejikamod.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/54463232395.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/48128434966.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/joravatupolesotitoraditub.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/liwunonutemumipadu.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/gujijeko.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/78289479546.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/56230858963.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/zififasimezuroga.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/tazijedawitinakutapof.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/56891780816.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/62363831263.pdfIn PDF document text
    • https://studyhalltracker.com/files/file/43846327378.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/rusegodoxesusedalifutu.pdfIn PDF document text
    • http://gajagotour.com/UserFiles/file/24029994239.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/sawekizawuxaza.pdfIn PDF document text
    • http://salkim.com/userfiles/file/94957316260.pdfIn PDF document text
    • http://dsraxys.com/uploads/zasimiredarutafo.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/22117689004.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/xodozikipizibofofalaka.pdfIn PDF document text
    • http://avon-bratislava.sk/files/files/vugumaji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=tolerancia+a+la+frustraci%C3%B3n+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D6 18244 bytes
SHA-256: 31507c7b33fa1dda40560c2b6ea2657c578b24f13356514dbc920de3538b09a5
font_01_sfnt_off000106f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0E 10816 bytes
SHA-256: e7bc5f2708d9eab7df30f155d0ec9c8ea36a87b1ae7a2e24a413c4a5221acd92

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