Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c0a5618460d62e…

MALICIOUS

PDF

84.7 KB Created: 2021-09-21 04:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6df021e8bc16ae9f7b5d3538c6004973 SHA-1: 9e4800e303d6ba77927e253f6e1f00f202e77db1 SHA-256: 96c0a5618460d62e6bde88362ae4a9fb3dc0ac50fc18d98816b4c82fb88ed4d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure align with common phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://garglob.ru/uplcv?utm_term=best+music+player+app+offline PDF link annotation
    • http://bkht.vn/userfiles/file/40335714659.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/53526454413.pdfIn PDF document text
    • http://sintniklaas.kinderopvangpimpeloentje.be/ckfinder/userfiles/files/wenutepus.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/eda451143f3e254520af6b6adfad6236/77126339798.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/66742298770.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/22499567242.pdfIn PDF document text
    • https://kede.org/userfiles/file/9528128954.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/88995483632.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/9286040429.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/rovojizizifesibajuroger.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/76706643255.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/50222289089.pdfIn PDF document text
    • http://michael-dhom.com/webseiten/file/93559407126.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/71810537769.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tasapexadebifarifo.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/f10fdd33d82a8f030437ddaece0cf625/92206577306.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16140090f84e6d---50560702287.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/wubonefu.pdfIn PDF document text
    • https://longhoang.vn/upload/files/60509755934.pdfIn PDF document text
    • http://xageunion.com/userfiles/file/32902699378.pdfIn PDF document text
    • http://xycrusher.com/d/files/jimetobova.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/88684649472.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_off0000e795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 17248 bytes
SHA-256: be4fb01d65ad37fa9e2c56b035ece1ea186f51d891fb54565b428ae00efd73fe
font_01_sfnt_off0001141d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141D 10908 bytes
SHA-256: 51ef07e5c0fefeba663726653f08163133146fb509da3fc34929241f52f44fb8
font_02_sfnt_off00012d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1