Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00edf6f53d18380…

MALICIOUS

PDF

75.3 KB Created: 2021-04-02 20:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef03c0f3ecc095aa7427d33a7149b0e9 SHA-1: e109bc09b2d5dc086258680c6ae53f8097a8baa9 SHA-256: a00edf6f53d18380826fa90be1468fa79324ee08c9766f49e35cb8afaf724424
104 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The presence of embedded URLs and a visual download button lure suggests a phishing or social engineering attack aimed at tricking the user into downloading further malicious content. No scripts were extracted, but the PDF structure and external URLs point to a downloader or phishing campaign.

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://kuzutuzo.ru/award?keyword=microbiologia+koneman+pdf+gratis
    • https://cdn.sqhk.co/nusideja/1hgypGG/zarov.pdf
    • http://pojokup.getenjoyment.net/better_homes_and_gardens_cookbook_download.pdf
    • http://rogevunesopu.medianewsonline.com/oxford_dictionary_2020_free_download.pdf
    • http://gakawisogafuga.mygamesonline.org/raluxasef.pdf
    • https://cdn.sqhk.co/dodazija/fhdhi9c/43908073170.pdf
    • http://pogawubujogeje.mypressonline.com/aptis_test_pre_exam_workbook_download.pdf
    • https://cdn.sqhk.co/lilaxikixo/cvA13yY/4222950605.pdf
    • https://cdn.sqhk.co/puwipaneke/bX3m0tT/duxaxokemenekap.pdf
    • https://cdn.sqhk.co/guviterolovu/dQihige/59845512677.pdf
    • https://cdn.sqhk.co/pekotegafod/iKxvF3L/easy_homemade_cake_recipes_in_microwave_oven.pdf
    • http://fejekadiwoxobiz.getenjoyment.net/1725251703.pdf
    • https://cdn.sqhk.co/tijinujul/dghKOgW/salobovuriforoxizib.pdf
    • https://cdn.sqhk.co/titabofasika/WThcdyM/escape_puzzle_new_dawn_walkthrough.pdf
    • https://cdn.sqhk.co/womafafowix/gcpUphj/30734822798.pdf
    • http://jugapus.sportsontheweb.net/learning_behavior_analysis.pdf
    • https://cdn.sqhk.co/momujolo/igghFmq/neo_geo_pocket_game_cases.pdf
    • https://cdn.sqhk.co/zumedizojas/hd6oib0/cordless_phone_answering_machine_big_buttons.pdf
    • https://cdn.sqhk.co/wexapitode/heahjid/gazemakefoxur.pdf
    • https://cdn.sqhk.co/rifarako/hahdYic/65301597215.pdf
    • http://tavegumata.sportsontheweb.net/mopifotejabug.pdf
    • http://benaletuzulug.sportsontheweb.net/cm_list_of_gujarat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rojanesifilagu.myartsonline.com/shinedown_simple_man_tab.pdf
    • http://vomewudige.atwebpages.com/advisor_alpha.pdf
    • http://pudugivifo.myartsonline.com/upload_to_kindle_app.pdf
    • http://marurutefa.atwebpages.com/nasifufomunazobuxolemi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e511.bin
bb9fe3bcde8adc9aab3c36c8d4affd1ba14a327a362f69e945b9c1547468d571		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 5684 bytes
font_01_sfnt_off0000f85c.bin
fe147d62c6f17cdf6c7fa5d08b5885675eb5ae0ece2a6263f817e9dcc939d90a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 12080 bytes

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