Malicious PDF — malware analysis report

Static analysis result for SHA-256 437199f7d34cfce8…

MALICIOUS

PDF

76.8 KB Created: 2021-02-12 12:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: cdfd9538b58878a52ef85b41cceff34d SHA-1: 9395fc30fdd3a2cd371ca1e2f62e69ab3db838b0 SHA-256: 437199f7d34cfce88971a9a813527fe9efb7ad1474da94b2e38fda78e09a5129
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document's primary function is to trick users into installing malicious software disguised as a browser update or extension. The embedded URLs, such as https://jottigo.ru/wix?keyword=webgenie+swf+player+pro+apk, likely serve as the distribution point for this payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://jottigo.ru/wix?keyword=webgenie+swf+player+pro+apk PDF link annotation
    • http://bilet-pdd.site/standoff_2_apk_mod_menuzzqah.pdfIn PDF document text
    • https://pemejelusapi.weebly.com/uploads/1/3/1/3/131398576/rebefigomuf.pdfIn PDF document text
    • http://itwomen.space/302523381359fnb9.pdfIn PDF document text
    • http://prolac.ru/bugs_bunny_cartoons_1940sa39ic.pdfIn PDF document text
    • http://auth02mobility.com/27294347472z8hp8.pdfIn PDF document text
    • http://demask.space/all_bengali_serial_app0bvq6.pdfIn PDF document text
    • http://duplicwcnj.space/fajanodekoli7cn.pdfIn PDF document text
    • http://fridgeservice.ru/download_rosario_vampire_s2_sub_indow3hl0.pdfIn PDF document text
    • https://pawonojureva.weebly.com/uploads/1/3/4/5/134522231/5376758.pdfIn PDF document text
    • https://kibibobufusasi.weebly.com/uploads/1/3/4/6/134643218/1706639.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/kiShggd/nail_art_tool_kit_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/duxapotor/99hggiy/walukaga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/14896267379.pdfIn PDF document text
    • http://jewikotadukusug.rf.gd/27244014231.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/70844299385.pdfIn PDF document text
    • http://fowewimoseno.epizy.com/ccnav6_packet_tracer.pdfIn PDF document text
    • http://xuzatazuji.epizy.com/5049504289.pdfIn PDF document text
    • http://mugekalamiwatek.epizy.com/figukon.pdfIn PDF document text
    • http://beguresenoraw.epizy.com/ripiwoketasok.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/bubbly_lava_song.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0000da07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA07 5480 bytes
SHA-256: e18dd37635f9f618b2cb030a1551bdcfc4864151eaa9f995e26dde593ebbf6c8
font_01_sfnt_off0000ece1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE1 10552 bytes
SHA-256: 716166bbf74d05dab8d4897967cf13ba0f66468af1479a8094ef00c7d971dbc0
font_02_sfnt_off00011120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11120 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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