Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d391c26c01f7098…

MALICIOUS

PDF

74.6 KB Created: 2021-09-18 03:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c3ea02a0d0d4a21d01d0ff7572842a63 SHA-1: 1982f38e714d2215a13097077bff0f63297f80c2 SHA-256: 7d391c26c01f709835b40a97ca288b0834b55d23d7ed8c60344b1f04e366d7e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=galaxy+wearable+windows+10 PDF link annotation
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d35dca2b12---mebebageribakalun.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/sixizotozadaze.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/28881956935.pdfIn PDF document text
    • http://smirna.pl/files/file/26893616693.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/tifuveduvepudizeriwake.pdfIn PDF document text
    • http://artepcb.com/upload/files/23615980354.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/gifirov.pdfIn PDF document text
    • http://gartenmessebau.de/uploads/files/77829410420.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/75231557738.pdfIn PDF document text
    • http://fivelscope.net/fckimages/36319920977.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/doxupixelibudokeji.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/62577386955.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/12348678836.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/rolafurofikakovumug.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26896004154.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f5a0a1ed13bf39ba1f99e2d8e7218fa/38555801585.pdfIn PDF document text
    • http://pass38.com/images/contentimages/files/57261341486.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/88231613303.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/78521168879.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/96885862738.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/bovivixugitik.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16134d817668ca---60325640354.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d8327ab34---3744375618.pdfIn PDF document text
    • http://elskenecologie.nl/files/67393400812.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_off0000bfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA7 16672 bytes
SHA-256: 304456db540da5b8d3853239f3dc57039de82fc64aa473004628b0ee4a533a14
font_01_sfnt_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 10800 bytes
SHA-256: 04fd3f7c14212acb8890640a260eef92c6c755b59a8f285dcdc0d4c6fb6f182e
font_02_sfnt_off0001035d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1