Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3947802bb82606d…

MALICIOUS

PDF

78.7 KB Created: 2021-09-13 14:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6f33cc55b88c2cc5b00cae549e8fea03 SHA-1: 48e0178119316654b9fa6ba4be209f47efbf2f6a SHA-256: b3947802bb82606d9d7ad68a66f5bb10a435335fe926c2ed0b3f73ce4717e9bd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many pointing to disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript suggests an attempt to execute malicious code or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://noithatmfc.com/media/ftp/file/75116188246.pdf In PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/68047601225.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350e061f1b1---womirenetefapapugedu.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/81282774328.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/ximovu.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/85369176137.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/30007794636.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/41292349367.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/baxesovumal.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/98968657033.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/35866388759.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4748e69d6---37078284650.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/20447294992.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/nipanejadujebinumek.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/56313329111.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/kopezutabe.pdfIn PDF document text
    • http://hoangnampte.vn/quangbasanpham/app/webroot/upload/image/files/41492661483.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/pizawixi.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/35325183306.pdfIn PDF document text
    • http://cctechlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/84035170200.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/54405623851.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/55782517364.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/80261782017.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/pekuxozevoda.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/86726075464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=app+to+watch+all+web+series+for+freePDF 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_off0000d067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD067 17032 bytes
SHA-256: 3ecdc74246d9dfc3912f40842ff91cd588841516f2c0c898100124553e0d7206
font_01_sfnt_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 10680 bytes
SHA-256: c97a0c2597abffb7425240fe9137477f38fd053d881d85dcd673ff0828447d3a
font_02_sfnt_off0001152f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.