Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ded3c5267649da…

MALICIOUS

PDF

74.8 KB Created: 2021-09-05 22:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aac7fb80cc311e8fa89dfd986d7d8516 SHA-1: 817f625887a725e2907862a62f4d35391026b8ea SHA-256: 02ded3c5267649da608664621f399e5ecc440b4687afe8850993bac1a67d1540
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and links to various websites, many of which appear to be part of a link farm hosted on disposable or compromised domains. The primary function seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://catamma.ru/uplcv?utm_term=dbms+pdf+notes+for+bca PDF link annotation
    • http://kalkulacka-hypo.cz/userfiles/files/14056501205.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/lijewavalosatasonazuruw.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/xapakibitapunojuf.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/boranosuxujunarizusomifer.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/sozovepelifijepuvibitaweb.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/nesuka.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/tesovaxigirapamutofejake.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609448a7d725d---nixodemevuliwitav.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/3517jrtmvf398p74th0n9i3d64/dugasolonerilabov.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16077334b82408---49006408409.pdfIn PDF document text
    • http://15881588.com/ckupload/files/vasixefidal.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/wemugurekavime.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/nelirulebizivomog.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9963075d83---40551046334.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/2d8d3c89559b5574f0d552200adbdeb4/jisozuxevet.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/31493998706.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/wepijopirosumap.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e88787a22---23142470055.pdfIn PDF document text
    • http://www.umadai.com/ckfinder/userfiles/files/70113158644.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/72017735308.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ad7ba071a---76270464092.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/bf367a5b3920f39ed24ff336bb37c554/26303561098.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70e713eb86---lilajazilefumitug.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/64457253116.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/62673557804.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/nivapusasasolel.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_off0000c2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FC 16412 bytes
SHA-256: 92a4004658d766d025124165ae5aebdbde8fc451009c72836823b1212820ae41
font_01_sfnt_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 10784 bytes
SHA-256: 1ae5aa2436b0ddadc4ca7a389a6db87dea603c51e3121382b25ceab1e7a5e1d5
font_02_sfnt_off000105bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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