Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba0a00405ef7ea6…

MALICIOUS

PDF

78.5 KB Created: 2021-04-30 17:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0396600da7892d4160f9c17ee2f1fc8b SHA-1: 5791d675b3f006d3196005bee6c8f8648361d147 SHA-256: 0ba0a00405ef7ea6853c661c7372f797cf64df3cb974a5f4a1950cbec98079fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://midufefew.ru/strik?utm_term=poulan+pro+weed+eater+fuel+line+diagram PDF link annotation
    • http://sayseedokg.com/zemevopilanajumowupibajobtzdh.pdfIn PDF document text
    • http://lusolakidareve.mywebcommunity.org/what_are_the_main_characteristics_of_liberalism_and_realism.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/jd8A8ea/nasa_news_2020_june.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/cloud_data_privacy_issuesmouxp.pdfIn PDF document text
    • http://fdvsefwfrw.space/why_do_mice_like_atticsq65a8.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/hiivKhi/88874236172.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/barbituric_acid_synthesis.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/ij3iAkg/my_talking_ginger_2_apk_mod.pdfIn PDF document text
    • http://dfds.in/niliwebewufittwolp.pdfIn PDF document text
    • http://visunuduxat.mypressonline.com/how_do_i_connect_a_microsoft_wireless_keyboard_800.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/nujujetej.pdfIn PDF document text
    • http://creamspait.xyz/jogurz0w4m.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/f7hf0gd/55065461540.pdfIn PDF document text
    • http://speak4pro.com/74hc165_arduino_tutorialj63tl.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/libosokune/best_calorie_chart_app.pdfIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_99703fcc1b0c410db22c5909458456cf.pdf?index=trueIn PDF document text
    • http://zitulogakapede.myartsonline.com/42505921690.pdfIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_52b96922889a401db6d8b06aef5c7587.pdf?index=trueIn PDF document text
    • https://26aaa629-0581-4e25-ae32-a194504e59ab.filesusr.com/ugd/2d4e87_bb436c378a884447b5e54b7ef6b1ce20.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/82061382210.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/6927779109.pdfIn PDF document text
    • https://3c59ccad-08dd-474b-8af0-a42d91f20399.filesusr.com/ugd/489ff0_23cd075fb6e548efa99817e5743f07c6.pdf?index=trueIn 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_off0000f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 5276 bytes
SHA-256: 9d7a7b54609dc360ef9bbef4306b00f91e49c7ef43121a259d511757c05d1f85
font_01_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 12016 bytes
SHA-256: 99ea7e2cf25fc28813efc702c2ebb23ed8f29ffa395b063bc1f22422cb26cc15

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