Malicious PDF — malware analysis report

Static analysis result for SHA-256 58670af270d6d19e…

MALICIOUS

PDF

79.7 KB Created: 2021-03-17 22:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc0b4806e7fbe3fe24ac088738ea061 SHA-1: 7989bfabab9c76052f0348d72eb16eac70616398 SHA-256: 58670af270d6d19e8ba263511ca1bdb747449d046979e772b44a4ae0cd17430c
104 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The presence of a visual download button lure further supports the phishing or malware distribution intent. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=using+mis+6th+edition+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4492278/normal_602a26a880283.pdf
    • https://cdn.sqhk.co/renonidofel/8Q0jigc/car_city_driving_sim_online.pdf
    • http://kixurox.getenjoyment.net/real_estate_investing_books_australia.pdf
    • http://jologedeb.getenjoyment.net/ajeeb_kunba_complete_novel_download.pdf
    • https://cdn.sqhk.co/zivuronufepu/hWgfDkc/free_download_basketball_scoreboard_with_shot_clock.pdf
    • https://cdn-cms.f-static.net/uploads/4375199/normal_5fd9f29d22944.pdf
    • http://rimarilomikozu.medianewsonline.com/42622298171.pdf
    • http://fovikoxesaweziz.medianewsonline.com/iphone_5c_price_in_dubai.pdf
    • https://cdn.sqhk.co/kexofodatop/ie4Kt1D/42055464523.pdf
    • https://cdn-cms.f-static.net/uploads/4371010/normal_60176504bc816.pdf
    • https://static.s123-cdn-static.com/uploads/4496360/normal_5fdf001ad0d2f.pdf
    • http://zipubezexupoka.mywebcommunity.org/16166558004.pdf
    • http://vobajujabu.mywebcommunity.org/25070138318.pdf
    • http://jefevivavifax.scienceontheweb.net/louise_hays_park_history.pdf
    • http://gagitevanonuti.mywebcommunity.org/jurevune.pdf
    • https://cdn-cms.f-static.net/uploads/4421770/normal_6027ae2fc25de.pdf
    • https://cdn.sqhk.co/fedefuxu/hdfjcgh/android_17_18_fusion.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_c10a79a13104475ab9e872237c6be2a1.pdf?index=true
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_1b98fe67aed34175ab622829cbd14082.pdf?index=true
    • http://jowokepo.atwebpages.com/bipaxiroponejozunu.pdf
    • http://vuxebezedigelun.onlinewebshop.net/why_does_my_acer_tablet_wont_turn_on.pdf
    • http://xasagode.myartsonline.com/download_eraser_full.pdf
    • http://siniligavaxuvul.onlinewebshop.net/how_to_smoke_with_weber_smokey_mountain.pdf
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_48db1bd6ad3440edabfbde1972e30750.pdf?index=true
    • http://pekafujojef.onlinewebshop.net/new_inventions_in_computer_technology.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b9.bin
038684b38d894e536d3259cba9eab52dfe400f8ae398a1831f9c5051bb504fb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 5480 bytes
font_01_sfnt_off0000fb36.bin
1a5035f41d0562e68b87f21a97015156a55787488024016274c97605fc7033e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 11508 bytes
font_02_sfnt_off000122c6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122C6 4324 bytes

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