Malicious PDF — malware analysis report

Static analysis result for SHA-256 1342f7fdedf33bc2…

MALICIOUS

PDF

85.0 KB Created: 2021-09-17 01:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fb902b3a69be9f179c45f5e815b693aa SHA-1: 88dd265456e52d26f91fb9110510d91cd381c033 SHA-256: 1342f7fdedf33bc2588803bf6622f74cea4057c8a05eb228247a8952305c6cd7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. The PDF also functions as a link farm, with numerous external URIs pointing to potentially malicious content. The embedded JavaScript likely facilitates the redirection to these external sites, which is a common technique for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 https://nmg.lv/img/uploads/files/xokimijepu.pdf In PDF document text
    • http://lotusburbank.com/uploads/files/29360870.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/17096450351.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/60802421365.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161434ccbebe91---xobalowija.pdfIn PDF document text
    • https://people11people.com/uploads/File/mozaw.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/79347330373.pdfIn PDF document text
    • http://thermocomfort.ca/userfiles/file/pafota.pdfIn PDF document text
    • http://expresskaliski.info/file/sudokenijonajasoziz.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/lufetepajo.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/kedewanuguzejirunusufewab.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134d353e079b---godevuvumijovojum.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/vejolabuwivegabemus.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/21940810881.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/47783909175.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/65964853385.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/22608905412.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/23891560445.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/51980095425.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/bodedugafenulabur.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/mezogesarupur.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/seketa.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/72894820368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=turbo+scan+pro+apkPDF 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_off0000e560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE560 10292 bytes
SHA-256: 62f9d63cea6666c1988e67d1e24716f4ad312132e4f0a7bd4359bc1ba5db80cb
font_01_sfnt_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 19152 bytes
SHA-256: 9011283a155be5eea2a309de9e829840d83b327bc1b2edca85b4310346686833
font_02_sfnt_off00012e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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