Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3d626f099e5aff…

MALICIOUS

PDF

81.9 KB Created: 2021-09-23 22:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: cd1d8cfdb66616b6115bfb7a5a98cb81 SHA-1: af69b50a1e719a90bb628975a90b85292d5b0d59 SHA-256: 0d3d626f099e5aff721e12aaa2cb5b4181b01e864e212dbd29647eed8bc345ea
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or are hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of a 'coin master mod apk' URL suggests a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://cleartunemonitors.com/ckfinder/userfiles/files/239118946.pdf In PDF document text
    • http://modern-pro.ru/files/file/40477543801.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/68246848071.pdfIn PDF document text
    • https://doina.md/fckeditorfiles/file/mabipovurovolupeker.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fe2c967ebe8249e6c2b24c2ca3b4e108/63566380708.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/fepavikulewokuwizo.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/sozafex.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/xalolotu.pdfIn PDF document text
    • https://interno-kazan.ru/upload/files/11539957237.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/c2dtmpev067fr6v30dgohe54vi/maboferadaw.pdfIn PDF document text
    • http://lawyersmarketingusa.com/user_upload_image/file/In PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/83749582602.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/50727965783.pdfIn PDF document text
    • https://edenestates.com/ckfinder/userfiles/files/zosipurozajolisabuwe.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/suzasaporugobama.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/15457432592.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/95713442987.pdfIn PDF document text
    • http://agro-partner.com/Image/files/befaweza.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7aef8c9477832b20b71d616f7ca77374/38625897101.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/nalarur.pdfIn PDF document text
    • http://dyccpharma.com/upload/files/50091667911.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/39011050445.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/90882620698.pdfIn PDF document text
    • http://www.leasebridge.com/CKUPimg/files/60952187579.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/boragikogifabow.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/2728110580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=coin+master+mod+apk+2020PDF 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_off0000d8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DA 10872 bytes
SHA-256: 4b087c97cb90807ce6b073b8a970a6f0b78d6b970e53bb6d4459cdeb20fe1a9f
font_01_sfnt_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 18124 bytes
SHA-256: df4f60dfad03cac02e2168aac595315994672e2d817a93b4eb9e3cb8b976dd6a
font_02_sfnt_off00012209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1