Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede75a216299c2fe…

MALICIOUS

PDF

79.4 KB Created: 2021-09-22 23:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 18b5ac519be94d4004dc743814dc1416 SHA-1: 1f8fcacc477ac3c18ac1c70058d2a4068c3ddae8 SHA-256: ede75a216299c2fed405c3c4c1ef3a573bd670dc210780b27d3f12f6f70336f4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Numerous external URLs are embedded, many pointing to unknown or potentially malicious domains, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest an intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://mislenyiallatorvos.hu/userfiles/file/xelolukim.pdf In PDF document text
    • http://yuanhebiotech.com/upload/files/28835749214.pdfIn PDF document text
    • https://yifff.se/userfiles/file/12363995274.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210912105434.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/noneleveno.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/172029441276.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/i05ob4mo0vddvh59ragu3a2597/zugepikerebonevimi.pdfIn PDF document text
    • http://kleinschaden-expert.com/userfiles/file/67596908464.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/84645188724.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/66434837401.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/pitumotiwugapuk.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/kanapapugavagagimudiwax.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/34465841058.pdfIn PDF document text
    • https://makanbanyak.net/contents/files/dajarutenuzal.pdfIn PDF document text
    • http://www.petersonassoc.com/emailimages/file/lixusajalaz.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/dafedosigi.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/tazazowomalomupimiraluzu.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/kavowiserujegaxixodekas.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/meruruzozizifaga.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/88729778105.pdfIn PDF document text
    • https://scalping.ir/data/files/file/59692279786.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/zolovoziravow.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/24240447659.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202191645123849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=symptoms+of+pinched+nerve+in+neck+shoulder+and+armPDF 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_off0000d20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20D 16704 bytes
SHA-256: cc8d7e0674cbf51839a6e8211872f4946e9e70daaf00c8c6d06163ad58ac690b
font_01_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11525 11332 bytes
SHA-256: aaf20b1d374c3cca165b1a7fcbde4cdca5dc0b6165862672d3d52d45848bf94d

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