Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30a1a223ebb9964…

MALICIOUS

PDF

79.7 KB Created: 2021-03-25 02:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1ffc4fc197635b5238c103b652aab8a3 SHA-1: bc5daade66d99ec9ff7341d1e7f9150c7bb50fbe SHA-256: c30a1a223ebb99646e065a22cc85a28525ccab1d74a050b49736e2e66a29547c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a high-confidence ML classification and ClamAV detection for phishing and trojan activity. It utilizes a redirector URL, specifically 'https://midufefew.ru/wix?keyword=net+force+particle+model+worksheet+3+answer+key', to lure users under the guise of providing a worksheet answer key. This suggests an attempt to deliver a secondary payload or lead the user to a phishing site.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://midufefew.ru/wix?keyword=net+force+particle+model+worksheet+3+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445726/normal_5ffe0c1113ed8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401697/normal_6006e114183ce.pdfIn PDF document text
    • http://lozomaneje.getenjoyment.net/samebavipo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371808/normal_5fdd854e5a412.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/belcorp_peru.pdfIn PDF document text
    • https://robavefozaxun.weebly.com/uploads/1/3/4/3/134379548/tizivatowafojilubixa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417137/normal_5ff5f01e273a5.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/19123789739.pdfIn PDF document text
    • http://birojuxadafek.iblogger.org/ponuvibemuwikibatopoladiw.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/which_is_easy_machine_learning_or_data_science.pdfIn PDF document text
    • http://pedron.fun/ff_live_streaming_hari_ini_tv_onegw4bk.pdfIn PDF document text
    • http://m-ryanaf.site/788712998937ysmf.pdfIn PDF document text
    • http://peroruse.iblogger.org/amsoil_pi_performance_improver_review.pdfIn PDF document text
    • http://marketitaly.info/7051874718jxa3z.pdfIn PDF document text
    • http://fruktovik.com/89369382762fv3d2.pdfIn PDF document text
    • https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/ralaxawiseri-gajodo-kabodakiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_601cb14fcf73f.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_2034e3a9ea854657a05deb0aa0feb706.pdf?index=trueIn PDF document text
    • http://zimopup.myartsonline.com/caps_for_sale_crafts_for_preschoolers.pdfIn PDF document text
    • https://7a3463bf-3117-47cc-940f-ad9d50d05675.filesusr.com/ugd/9f2514_41e4f9e8c57c44dcb6756e86bb31a2e0.pdf?index=trueIn PDF document text
    • http://daponub.epizy.com/wrong_turn_7_movie_full.pdfIn PDF document text
    • http://lewafozilit.epizy.com/how_to_repair_kitchen_faucet_handle.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_df57be77fc47415ea40631d035cea109.pdf?index=trueIn 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_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 6436 bytes
SHA-256: 6f17dd9b39f57ab89ac51934274acb5aafd3fcbf5e973236d75537a3fb98545c
font_01_sfnt_off0000f7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DD 5788 bytes
SHA-256: 4b82703dfc922b8c1fa5ae7d7416043ca78fa8ca480e6c8e2b9bb1e1c6febc7b
font_02_sfnt_off00010b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B87 10904 bytes
SHA-256: 4a0ea5bcf5102dfa8a5337d6ab472048b2e3d17e5b726c4197b399fc11b05ee2