Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7d7ec0d62cb82b…

MALICIOUS

PDF

93.6 KB Created: 2021-07-22 20:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 24dd0918629d3619fd5d540d0df5d424 SHA-1: 92d49d5d974c623a0ab4c7dff48d0b87bc5cf18d SHA-256: 0b7d7ec0d62cb82b8a22ef396efaa589c3d8b5e10ddcd3941f9e909b59198790
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6536bc6250---tunezugetexemezi.pdf In PDF document text
    • http://cesurmakina.com/userfiles/file/boxebuxovaxudoxadoliso.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/pjhqd8d5l6lhnlf2uhjno62ne0/xilesutifofizobabiguza.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/ritaweduxowe.pdfIn PDF document text
    • http://nova-auto.com/upload/15556694055.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/gr28haudog0pak7e9f1ssb1d08/18706993446.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/vipekdq6l2l26joi6o84rnitc0/zufoteve.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/nogidokemi.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/10508084718.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/14950e35b5f61f555fad5cb0057022aa/pagidipovagel.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607840d6a342b---sokupijaferarali.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/pesuxu.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/sizemowesod.pdfIn PDF document text
    • http://e-kva.ru/admin/ckfinder/userfiles/files/77262073045.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/revenasogu.pdfIn PDF document text
    • http://dejede.com/userfiles/file/35816235148.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/bonigevikulumegisobunevex.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/68558669272.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/f2be6cc06e55bee3b6d21b569df53483/lesemag.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/ripedovixufojal.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/kasarivigudajawojem.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41787dad0---tojukuvuzatodezov.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210707051615.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079f3c25ce28---53771212121.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/a8f6c8a7pd23a6o9i525e5cfc6/najavuluna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=shadow+fight+2+cheat+free+downloadPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE329 17280 bytes
SHA-256: 89dce03d4c2393184590a94b5202527d5e9817a0384637371207f28e92d83d81
font_01_sfnt_off0000fd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 17732 bytes
SHA-256: d5e179766493df3cdadd8e7771ed87e22c81717b11bb78c68af090d5c1dc503b
font_02_sfnt_off00012afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFD 2708 bytes
SHA-256: fe97b55f91f4f77822dc9cbeac25cabdd4610cc65dafadbddbe38748d0cd215c
font_03_sfnt_off000136b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00014ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC8 10868 bytes
SHA-256: 747829767b49b1735517977a842e83301624b395df32d8c7fd8871c3c9d26d99

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