Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69d37d2674b6a31…

MALICIOUS

PDF

74.8 KB Created: 2021-10-02 11:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 77eaa22badc0f5d12139da44a3aa3b01 SHA-1: 38d6f1c4363098ce62464e96f712f2bd1a308ec2 SHA-256: b69d37d2674b6a314c55393b3c1d3b1044fc9fcddcbc73dbf812d35e223e23ff
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be disposable or compromised, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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=what+do+african+bush+elephants+eat PDF link annotation
    • http://tvps1.juicy-group.com/editor_upload_image/file/kozijug.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/bagasizunelinefew.pdfIn PDF document text
    • http://clingac.com/d/files/71447994293.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/9774801116.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16157fc479511d---fumepixenipatal.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/79609862423.pdfIn PDF document text
    • http://pedraferro.com/files/files/telipat.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-17/20210917203754521731.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/42735111052.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/kufer.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/43232660775.pdfIn PDF document text
    • http://talentfuturesservices.com/sharpinstitute/images/files/vefotanibixixevoj.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/sigakupuniwigesevire.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/73996625094.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/fomojagumewixowa.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/91874920397.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/karafukeji.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b24fa99b5a---mebatapibuk.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/69316508229.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/39301685430.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/16277068163.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/kifegewugefonewigolaxatok.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/161558b8fe2aee---kewofejej.pdfIn PDF document text
    • http://phanvienphianam.com/uploads/userfiles/file/bizulo.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/72135011150.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_off0000be2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE2C 10948 bytes
SHA-256: 65f0582caf761e0b26f36147d3c3db1ae64e7d431f1f91042f52690056258162
font_01_sfnt_off0000d746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD746 18084 bytes
SHA-256: 4f9ebfa7af19098b45c534abf295364b1ff760bfa595b998acc0e0abeddf62bc
font_02_sfnt_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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