Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaf93898953496e…

MALICIOUS

PDF

77.1 KB Created: 2021-09-21 06:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6bdac4bc483c8d035ec980adafdb7b76 SHA-1: b038d071cce4b96f32cc89965d8d596ce320b28e SHA-256: ddaf93898953496e4a6e4a700a9c28418bff1175e177f85b754ba9e6175eb137
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing attack, leveraging invoice and payment lures to entice users. The presence of numerous embedded URLs, many pointing to potentially malicious domains, strongly suggests an attempt to redirect users to malicious sites. While no scripts were directly extracted, the ML classifier and ClamAV detection indicate a high likelihood of malicious intent, possibly involving embedded exploits or obfuscated content designed to compromise the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://basyapiemlak.com/yukleme_klasoru/userfiles/file/23425086031.pdf In PDF document text
    • http://standdominica.org/files/files/noxatixikel.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/ragezibazenubuzi.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/pimuxixe.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/ditolefopanifimexivezano.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/82415192498.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/zuzakodotuwolufatibab.pdfIn PDF document text
    • http://yjccnc.com/upload/files/dezamagugin.pdfIn PDF document text
    • https://cristalparkhotel.com/ckfinder/userfiles/files/wexojaget.pdfIn PDF document text
    • http://dar-tom.pl/userfiles/file/lapos.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/88193318069.pdfIn PDF document text
    • http://77owship.netsociality.com/upload/files/442164767.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/bilobibajazad.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/xejozagotobogitiwag.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c023e4d310---6365580859.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/gajix.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/gesedipomozifudaj.pdfIn PDF document text
    • https://sua.vn/uploads/userfiles/file/70688304118.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/88479844807.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/52430591601.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/95334201251.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/31171148982.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/30234952719.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=make+my+android+fasterPDF 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_off0000ca01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA01 17352 bytes
SHA-256: b02005830c71901dfaaaba6aa2143791e86c2034252c03477411c26fd4aec3b9
font_01_sfnt_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEA 10668 bytes
SHA-256: 4d1e275a0fe9cd65876e92fcdc4f8c5f8f055b5781e1eaf34b355967a694c598