Malicious PDF — malware analysis report

Static analysis result for SHA-256 986dcec9ae9aaa13…

MALICIOUS

PDF

110.4 KB Created: 2021-02-25 23:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 793d45eedbbcc28c073e212e799e4b06 SHA-1: 9357a35cf2d562a3c6a7a3c05ea99e7285f798c1 SHA-256: 986dcec9ae9aaa13c02846eb9c03d9bf11a2d4ba8c368e0e6977c57b65068740
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru', which is likely a malicious domain used for phishing or distributing further malware. The document body, though heavily obfuscated, suggests a lure related to educational materials ('amoeba sisters mutations worksheet key').

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/wix?keyword=amoeba+sisters+mutations+worksheet+key PDF link annotation
    • http://temivenoni.iblogger.org/ati_radeon_hd_4850_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/0jfgjFI/laweruzoga.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/asus_xonar_dgx_uni_drivers.pdfIn PDF document text
    • https://cdn.sqhk.co/loxosefivipo/if0hdPV/cookie_clicker_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_5fe709a23243c.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/gf5Hhhf/approach_control_free.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/fupanimejexamopeboja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe5af683a240.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/chaHjia/17527965631.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/jevelel/kirekurewabibola.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/bichagadu_telugu_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/portrait_photography_tips_iphone.pdfIn PDF document text
    • http://zevusup.atwebpages.com/dujuvubosadatokasag.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/65650653829.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/halloween_word_search_worksheets.pdfIn PDF document text
    • http://xujijanuzovaziv.rf.gd/travel_planning_templates_and_checklists.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/42085965740.pdfIn PDF document text
    • http://wupubobetob.epizy.com/nikotoravazipim.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/pilor.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/sevibanodetokemokoketemig.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/manually_win_10_1903.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/23989305213.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AB0 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off000174aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174AA 5280 bytes
SHA-256: 4c6bd2b514805410f369c30c11c135b3890e31829d2c5f1a98846088744265a0
font_02_sfnt_off00018686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18686 10192 bytes
SHA-256: 376f2ed6af1bd520fe7dd0b93538c74e717d5944ecb2380f32cee9631d77575a

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