Malicious PDF — malware analysis report

Static analysis result for SHA-256 08982ae8fa4b5435…

MALICIOUS

PDF

76.8 KB Created: 2021-05-05 16:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01978c50f45c0a23e408e1e9f1ac32cf SHA-1: 943840a70991a4a8442f6364b7fb230a5d7db206 SHA-256: 08982ae8fa4b5435dd5c450891ff4df8ec28550e754e4e7f3a138cec41922ff2
126 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The primary malicious URL identified is 'https://gimoguvi.ru/wb?keyword=best%20place%20to%20buy%20a%20speed%20queen%20washer%20and%20dryer%202020', which is likely used to redirect users to phishing or malware-hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gimoguvi.ru/wb?keyword=best%20place%20to%20buy%20a%20speed%20queen%20washer%20and%20dryer%202020 PDF link annotation
    • http://vuzetasavuxoso.mygamesonline.org/37202518965.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/52086713238.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/rthjlex/98069084486.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/0hhjA6b/treasure_hunting_tv_shows_2018.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/c8586b78-af27-464a-af44-958112a5c8d1/53962634865.pdfIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/18114947438.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/duxobogedosupobigog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb7ca11-7688-47d0-9783-38c74fd19d34/onan_microquiet_4000_generator_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/how_to_calibrate_omron_blood_pressure_monitor_bp742n.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ae551d-2782-4303-af32-a02fc6dadf7b/vunapadateled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261e2422-d90b-46bf-937d-04b4a440647a/peak_jump_starter_750_peak_amps.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/33565231591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e203956e-0f08-4d73-803d-db1b0d324fd0/sense_and_sensibility_chapter_19_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/wozip.pdfIn PDF document text
    • http://lopakesuzuw.atwebpages.com/matesudekedenulomemoge.pdfIn PDF document text
    • http://pupagerirawax.myartsonline.com/the_life_of_galileo_brecht.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e43793-645e-4596-a47e-e33e69792886/how_much_is_a_32_inch_flat_screen_tv.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_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 5944 bytes
SHA-256: 0d40c48d5113d3b4eb2e1193cbe019cf900dc1fe5d118b164a19a147eaa3ff7a
font_01_sfnt_off0001015f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015F 10660 bytes
SHA-256: fb6078ed3d0b8e0ddbc5407d7b61ef6959bc8a6af013af0c787a5b3b032cc9e5

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