Malicious PDF — malware analysis report

Static analysis result for SHA-256 046d19a99627ce29…

MALICIOUS

PDF

82.8 KB Created: 2021-09-13 05:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 94145faf2cc25cd3d385bc3a0d537804 SHA-1: de19cf75c997e9477bf66d5ee22739a779b12d6c SHA-256: 046d19a99627ce29f7ae6cebca6217d3275726c426d14205adecc0afd97aa5cf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many pointing to potentially disposable domains, suggests a link farm designed to redirect users. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • 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.
  • 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://tailormade-sales-marketing.com/userfiles/file/niviz.pdf In PDF document text
    • http://kbchina.de/upload/geremaxorepumijawaxape.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/tidetuwe.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/kawadinisef.pdfIn PDF document text
    • http://bikaji.zohukum.com/ckfinder/userfiles/files/98198521592.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/72755110866.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/28938733973.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/makatumazunowafitikozo.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/xasuvufowogasibanokas.pdfIn PDF document text
    • https://bawauang.com/contents/files/lizelowanozojovurepoxegop.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/tuxedozojupa.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/sowenuxasorowiwofujupaxu.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/legujurukegibuwibo.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/98408050349.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/beboxipiratowutifilekasi.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/23914249203.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/jupubukafe.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/72696010367.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/pevaberekokexovugikoxe.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/wixokukozonemiwozorulusi.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/21357847381.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/22135136427.pdfIn PDF document text
    • http://e-sheremet.com/img/24172243751.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da94b32b83---vovarinujewunafulixojoji.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/31041964722.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/5354632957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=android+photo+editor+open+sourcePDF 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_off0000e04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 10484 bytes
SHA-256: 6d32367bf8623fcd0b3b96ff7c7222478872fec4adbb2b0d0561333f52a7a5f5
font_01_sfnt_off0000f815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF815 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11027 17316 bytes
SHA-256: 5415263df6841532b03a5ab8fa07b6518130f04ad0881147159fbd442c1d0ce2