Malicious PDF — malware analysis report

Static analysis result for SHA-256 9412e9712700be31…

MALICIOUS

PDF

75.8 KB Created: 2021-03-09 05:57:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b8b3307edc087a2529dda4c03c627e18 SHA-1: 189eba764b5787cc3f4639ca971869f435c0bd75 SHA-256: 9412e9712700be31d44fa8ee58dfdf14929bc345ab1a4f8df7e47757ffe03df6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URI pointing to a URL that mimics a search result for a popular book, likely a lure to download further malicious content. The document body is heavily obfuscated, preventing a clear understanding of its immediate purpose beyond the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=robert+kiyosaki+second+chance+pdf+download PDF link annotation
    • https://cdn.sqhk.co/xunixenovapi/VEgjK8P/gaxex.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/ggjibSJ/spinach_nutrition_facts_carbs.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/jiihdl9/vufuj.pdfIn PDF document text
    • https://cdn.sqhk.co/poxudanefisi/dzfjj0D/zotofetituwabezozakeremuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_6037690182679.pdfIn PDF document text
    • http://vovality.club/how_to_make_study_guides_for_finalsey6k3.pdfIn PDF document text
    • http://myimperfectmomlife.com/scratch_2_tutorial_for_beginnersq4wdo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461761/normal_5feb9f6138be4.pdfIn PDF document text
    • http://life-news.tech/cuneiform_fracture_dislocationapaa3.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/b6f00fb6-147b-41cc-8f5f-460e301871a2/how_to_replace_saxophone_reed.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/british_heart_foundation_cholesterol_diet_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d41110e2-edf1-4840-85bb-695a3e7f3d25/interior_designing_schools_in_uganda.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/gidajosulizobib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ed0470-d185-405b-8041-2b8421455068/27593257324.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/alice_angel_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/worksheet_on_present_indefinite_tense.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/lazapopenexuwu.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/45634640659.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/tinevipafakuzidodujepif.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/tv_show_fbi_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/73595125831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff960629-112e-4d55-8d62-c1fca09e0b15/selefovijisu.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_off0000e8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A3 5648 bytes
SHA-256: a365695898c8374f2f1b2f2a7b476dc6541bb3144f24321975b163320d057022
font_01_sfnt_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 11352 bytes
SHA-256: e49f1358d3b60c74807314dbf971cb2118f752fc1c4d4c2cd24d861aaac0d8f4

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