Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4f61c5abb5cc4b…

MALICIOUS

PDF

80.0 KB Created: 2021-03-26 09:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cf7b98fd5c1e043e8455f2ac9bf6074 SHA-1: cc357b36d72de7ced7432a355511ed13889a4726 SHA-256: dd4f61c5abb5cc4b15ff37847c32875cda7c8eecce3ac85af413feead387d7ac
96 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, identified as a high-risk indicator. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to an 'earth worksheet', aiming to trick users into visiting the malicious URL.

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://seumenha.ru/wix?keyword=cross+section+of+the+earth+worksheet
    • http://tofotibuwul.sportsontheweb.net/10th_class_mathematics_guide.pdf
    • http://fivadoguna.medianewsonline.com/fofokarigudo.pdf
    • http://siwivelijutore.medianewsonline.com/benen.pdf
    • https://dekamukovesu.weebly.com/uploads/1/3/5/3/135324216/keniboge.pdf
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/b7acf34a7e.pdf
    • http://xivobivivupe.mygamesonline.org/34095200165.pdf
    • http://rozogididibusar.sportsontheweb.net/3587890131.pdf
    • http://tibijosetinaj.getenjoyment.net/editorial_writing_journalism.pdf
    • http://gugolufixa.mywebcommunity.org/weber_grill_parts_spirit_e-310.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://nudagimanefej.atwebpages.com/43437669096.pdf
    • http://kopurelotalad.onlinewebshop.net/17110120308.pdf
    • http://wujagenak.atwebpages.com/wuxivuxekaka.pdf
    • http://lavapokapajemob.myartsonline.com/wawafizok.pdf
    • https://s3.amazonaws.com/didowugorokirug/download_jumping_the_broom_full_movie_2011.pdf
    • http://tavamikilav.myartsonline.com/22192046164.pdf
    • http://xufoziminep.onlinewebshop.net/outline_for_research_paper.pdf
    • http://xakagigoneliv.myartsonline.com/integrate_cos_x2.pdf
    • http://pasifowon.atwebpages.com/rapixetux.pdf
    • http://fanalejowegop.atwebpages.com/discover_english_1_test_book_free.pdf
    • http://vimixof.onlinewebshop.net/sword_art_online_games_xbox.pdf
    • https://s3.amazonaws.com/widiku/40808682343.pdf
    • http://en.wikipedia.org/wiki/User:Brews_ohare#mediaviewer/File:Earth-crust-cutaway-English-Large_l
    • 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_off0000ee96.bin
f37cb66f718f3905a1c321db8cae1db300839320cfd2f4ba19e6aea0c6e91a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 4904 bytes
font_01_sfnt_off0000ff47.bin
f5c667fd523326dd25e943cd3dae205c399dda1cff5e5c23b8f99158fdcdffd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF47 10852 bytes
font_02_sfnt_off00012451.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12451 4324 bytes

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