Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e987a8aaeda88be…

MALICIOUS

PDF

70.6 KB Created: 2021-09-16 01:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dc3010e306fb55f574d7fa171499aa2c SHA-1: 12c46992d631aef4323d54f9234e5d9e6d05bacc SHA-256: 2e987a8aaeda88be88564c9ccb02b78a5790168393f25312a3ff103a17b8e7f6
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The presence of multiple unknown-reputation URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/uplcv?utm_term=how+to+write+a+hook+for+a+literary+analysis+essay PDF link annotation
    • http://etkenkalip.com/files/72588556187.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133db568f3dd---41560101571.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/64365427874.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/mowirowijedubuf.pdfIn PDF document text
    • https://camphacement.vn/upload/files/varerulelotokadur.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/59283250512.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/tekutawizalijubod.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/27401168661.pdfIn PDF document text
    • https://ever-progress.com/upload/files/lonimabixodem.pdfIn PDF document text
    • http://shopcode.ru/uploads/file/30873724488.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/bomalemuwofiwilajupadid.pdfIn PDF document text
    • https://tomaszbizon.tomaszbizon.pl/web/uploads/files/28804316397.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/zabek.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/noviv.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/92391008833.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109020931221950.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/voleve.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/lixegaxavutidixaz.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/28871384626.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/21290720485.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/51572028830.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/30060288570.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/25380645148.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/01/21277409716.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/viporan.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_off0000b5af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5AF 15244 bytes
SHA-256: 58f849ef4e2fddb216026af55f138e73104c8cccdd30b2eb162d92821e89b93f
font_01_sfnt_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 10592 bytes
SHA-256: 86563096c51f0bf19ddb1494392bdbe6c28279fb507c5a74cb756ed508fadbe6

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