Malicious PDF — malware analysis report

Static analysis result for SHA-256 d83cd37783dcc68c…

MALICIOUS

PDF

76.9 KB Created: 2021-03-13 17:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2b49144312b7e29d94ef71fe82c5e6b6 SHA-1: 4c371d48b894a860da944ab111cfdc50f2bc9395 SHA-256: d83cd37783dcc68cfc95b20de9223bc589e2bad6937b2acd1efccd211ce788df
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, 'https://soxebez.ru/strik?utm_term=hp+photosmart+6510+apple+driver', appearing to be a phishing lure for a printer driver. The PDF's structure and the presence of many links suggest it functions as a link farm to distribute malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=hp+photosmart+6510+apple+driver PDF link annotation
    • http://tejovotemikodes.getenjoyment.net/42912177876.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/yellowstone_map.pdfIn PDF document text
    • http://zixivudu.getenjoyment.net/netgear_powerline_1200_red_light.pdfIn PDF document text
    • http://indital.fun/24640674523logst.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/canon_mp160_printer_ink.pdfIn PDF document text
    • http://mejumeroxara.mywebcommunity.org/faruweg.pdfIn PDF document text
    • http://1green.space/61364671135j40nn.pdfIn PDF document text
    • http://italy-small.space/juxewuleditenaleex41q.pdfIn PDF document text
    • http://gakujimogudap.22web.org/72867562220.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/zedadokuw.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/46527331721.pdfIn PDF document text
    • http://damvglaz2.xyz/psychology_themes_and_variations_5th_editionj9hac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9903b8f1-51c8-491f-a011-e65a98fa5b81/fitbit_versa_lite_bands_jbhifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabb6c8a-a105-4618-b3bb-252871b80ea8/french_vocabulary_trainer_app.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/insurance_inspection_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/99338089707.pdfIn PDF document text
    • http://jopewadakos.epizy.com/mixed_conditionals_exercises_with_answers.pdfIn PDF document text
    • http://jaziwovapotulit.epizy.com/62321523195.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/jisiketaxex.pdfIn PDF document text
    • http://levapoloj.onlinewebshop.net/73593655950.pdfIn PDF document text
    • http://silimevi.epizy.com/calligraphy_apps_free_android.pdfIn PDF document text
    • http://puvepedep.epizy.com/wigozom.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 5692 bytes
SHA-256: 30353f0fcfc7fff209211e8e6f2e2e94a2ef1687081d055631fa60cee114abcc
font_01_sfnt_off0000f83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83C 14064 bytes
SHA-256: 4066948122c561a2429f41867e5e1cbf82d3f761bfc362e53d1627dd29a91f94

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