Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd95e65aa0e4d80b…

MALICIOUS

PDF

85.2 KB Created: 2021-07-14 05:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dda9aa32effe669395ef07c4e2a99571 SHA-1: 1e19e6ff4077ce4828f07ba95ced13c41ac1f03d SHA-256: cd95e65aa0e4d80b73d6a7399f24e8a69a1f9b115f31aa6be1766deb50f77094
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/205671630.pdf
    • http://hytechplus.com/userfiles/file/pozatesabodupaveni.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee6b45e24---mefemosoz.pdf
    • https://glbtrader.com/userfiles/file/xojenavi.pdf
    • http://sevimticaret.net/userfiles/file/71839460091.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608455d92a282---soduzujekumejomewawekuwiz.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755ba49b27a---89060877216.pdf
    • http://eraucheta.ru/uploads/file/94566677382.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/0f1c529a9b29fb72b978b79a6f71cd0f/5712141188.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6d15ee124---88877158919.pdf
    • https://pt2-turbo-j3t.com/contents//files/17626757239.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/2123aa1bceec22fca6ff04563dc9002a/bivan.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609808e6914e9---33771752278.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e39fea0c7---rudadozotowalixuba.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c9a947e65---lefidomin.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/060929c7f76258c67d61d2464e32af1b/zururexekenanup.pdf
    • https://cmoretv.com/userfiles/36845821028.pdf
    • https://derechosenred.org/aym_image/files/54305848981.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a5lbu75s0i1qu9cosbvtfvfjc7/towaduvugaditesafi.pdf
    • http://daiichilogistics.com/uploads/news_file/jukozir.pdf
    • https://thehero88vip.com/ckfinder/images_store/files/37912889702.pdf
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/xanugexoriwi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+measure+the+wavelength+of+light+using+a+spectrometer
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e583.bin
18a15c1adc02e43a086d0006d3ea583a1ab812a0facb61590a8d56d2a89687fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 11168 bytes
font_01_sfnt_off0000ff7b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7B 16792 bytes
font_02_sfnt_off0001178d.bin
60dc2216a38558602f59e66ca9b63019b32694ef7249ef3a971547c6b05d388f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1178D 17356 bytes