Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde8308099ba6336…

MALICIOUS

PDF

83.2 KB Created: 2021-09-20 23:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e5b28673217618d307bc7672e745151f SHA-1: 2d037d354c85162430c6f9968783fa4ffcc8b724 SHA-256: bde8308099ba6336be62654aff0d7bc873d72ce66ea08ef1d47800a6b92caa0a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically related to phishing. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://crysiq.ru/uplcv?utm_term=impossible+quiz+walkthrough PDF link annotation
    • http://aktifmedya.com/dosyalar/files/8957202473.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/kobigofuliwogogotebeti.pdfIn PDF document text
    • http://agro-partner.com/Image/files/wezigilevumesab.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/26594346327.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/mafuzotinirinonod.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161328a6112880---legesitanafabetidazurozo.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1dde6d4b4---rakax.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/31734717423.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/4qjnr9egc18l0q11qfqlq79l80/fubidarexepekagonemeb.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/vugogekarodum.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s0envah6tilr2ef9pfj2s2v9t5/8219074792.pdfIn PDF document text
    • http://cabini.it/userfiles/files/77187769608.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210901120158.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/6476329113.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/jigixejevipejejujulifewik.pdfIn PDF document text
    • http://unseretochter.ch/images/file/77104286717.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6ce2d03b4---migakozaxuwexawonafiw.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/rijuzokenexaweroxoxulofuj.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/c2314ee00a8c0112c1e99f5e8cc07d4f/towezoge.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8137f2fb8---tizuribaxax.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1613b80d296eff---pomujugifitojovupijiro.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/futur.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_off0000d90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90C 11168 bytes
SHA-256: a1e5b60030756139be89dd6ebcfb2ae0fa90a41f59f7fe1455427ff4ee7ac239
font_01_sfnt_off0000f2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC7 20260 bytes
SHA-256: 169ec8ff9b0a926b6bc06603bc5b9ed3d3218c28bea55c6a3a60f637c67850be

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