Malicious PDF — malware analysis report

Static analysis result for SHA-256 6848f4412d339be7…

MALICIOUS

PDF

91.9 KB Created: 2021-09-02 04:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6327e8a03474a15d96724ac20e86ea83 SHA-1: 099ebf1695aae96a2dafe9022f5952d34b72aa09 SHA-256: 6848f4412d339be7237460c7de76c5043f2f6d9d05c0f5096c521f1e7b245b6e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous links pointing to compromised WordPress upload storage and other potentially malicious domains. These links are likely intended to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/1f03a556156274003067eff1dc6ea707/52539019205.pdf In PDF document text
    • http://amirafouad.com/uploaded_files/file/93746652689.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/zikufixonagolemixanasexuj.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072d4951dfb8---60701272677.pdfIn PDF document text
    • http://blbr365.com/userfiles/file/1621471625.pdfIn PDF document text
    • https://oversaslogistica.it/file/bulavugasiloxodejezigegi.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be08943ac6d---40500745781.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/mutudegojefakazom.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/13941052102.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97cce0a152---7227850121.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/1474673426.pdfIn PDF document text
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/feroxojedeme.pdfIn PDF document text
    • http://alkanboya.com/files/file///90771082949.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/18217583025.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/minijezimegibo.pdfIn PDF document text
    • http://korytnica.net/data/files/68646737931.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/vafenosixizelamaw.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/88597719824.pdfIn PDF document text
    • https://lepjunk12.hu/uploads/files/20288418003.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f637a59d81---29750883721.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/garukugit.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/gkqmjrv2qdrn8uj04ss3vmt1ut/bakutanuno.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fbc910cd698---47684839370.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/34891623817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=justice+league+towerPDF 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_off0001027f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A91 18124 bytes
SHA-256: 8114cac7e5eb367fcec0c3bfbd5b0a00c3879fb2280394a0ff7eef65be90c604
font_02_sfnt_off000149ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149BA 10476 bytes
SHA-256: fe0378e43c4979637c03fd337fbb0ee73792a7548902843f4e80a42ca752aa2c