Malicious PDF — malware analysis report

Static analysis result for SHA-256 d474b2285fdb67cb…

MALICIOUS

PDF

86.4 KB Created: 2021-09-02 08:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be50a5692a005b08165c10cf422b04ae SHA-1: 6d080f0573355427b80cef1353539cef94f1c9c1 SHA-256: d474b2285fdb67cbea0350b1db752ce9bda5002b4ce1f92b86c67befdf3f5a6a
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=atoms+and+subatomic+particles PDF link annotation
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/vp4ast2rq2tgcauct9b1u9dgtn/jawuselulajejoget.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f9daab31---nadagunizitozefaf.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/sopijeronetanarerotatis.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/pogasajogopexebokuretera.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/coffrn578inf4tkhcka0mj87f7/41526518426.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/69332887867.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/8rkdb2jh3198aeth2eft1tidb2/21090523095.pdfIn PDF document text
    • http://avvolodin.ru/upload/file/13379289056.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/89365969078.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/df59b120f8da744fa823e7e071437077/gogoxifitimepenurolazawex.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aa51cc25832---62417827736.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d31e50541---firijazodowe.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/53317074324.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/ponasipufafili.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/76483310768.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/f04aca0d4469826ccae9cffc476336e1/kazosubedugetukunaseduze.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/tejovaduj.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210607_BB57D21335B2311F.pdfIn PDF document text
    • https://www.idd.no/ckfinder/userfiles/files/88343196611.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/kewakajemuze.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202108292249061416.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/6j48p2e7f4ipvu6s4453jsoh5r/nudotagefebe.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/wufixobelafe.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_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001022b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022B 10896 bytes
SHA-256: 67b8e6cbabfc1dea3fa30b17d33151fea74853dfca1adf38dd6448dbffd5a9f0
font_02_sfnt_off00011b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B21 18412 bytes
SHA-256: 6bc3990855702b99ae232a8def849674d4f21f3862b7a6b6f2350531f9d36fd1

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