Malicious PDF — malware analysis report

Static analysis result for SHA-256 538dad6a967fa836…

MALICIOUS

PDF

80.9 KB Created: 2021-03-26 03:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 478a067559fc4a07705631050ee1c50b SHA-1: d42c25b20c65a043b072f99cdec9543c2bdb6829 SHA-256: 538dad6a967fa83686444aec0a8aefb11187c4cc231ed842b6b90293d7d1ff20
136 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, for being a malicious PDF. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document uses a common social engineering tactic involving fake prizes or parcels to trick the user. The embedded URL 'https://jumiwimov.ru/strik?utm_term=rock+band+4+ps4+gamestop' likely serves as the initial point of contact for this scam, potentially leading to a phishing page or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jumiwimov.ru/strik?utm_term=rock+band+4+ps4+gamestop
    • http://kebenoda.scienceontheweb.net/fisher_paykel_dishdrawer_fault_code_f1.pdf
    • http://duwuzoruperiged.scienceontheweb.net/91874767649.pdf
    • http://sumapewub.getenjoyment.net/why_did_the_northern_renaissance_take_place_nearly_100_years_after_the_renaissance_in_italy.pdf
    • http://zosazufinur.mygamesonline.org/38794403387.pdf
    • http://vuroxinizona.scienceontheweb.net/5942364470.pdf
    • http://lazujifoxupa.getenjoyment.net/22254958424.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/midipes/handwriting_practice_ks3_worksheets_printable.pdf
    • https://s3.amazonaws.com/nafoxuda/47916372371.pdf
    • https://s3.amazonaws.com/kudufigunabi/zizogukiv.pdf
    • https://s3.amazonaws.com/dafumuxitupav/11253180463.pdf
    • https://s3.amazonaws.com/selivuvumepaveb/harmonica_for_dummies_amazon.pdf
    • https://s3.amazonaws.com/punurum/sears_craftsman_radial_arm_saw_table_dimensions.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/baaghi_2_movie_coolmovies._com.pdf
    • https://s3.amazonaws.com/xilasisefi/generator_automatic_changeover_switch_wiring_diagram.pdf
    • http://sifebitufol.onlinewebshop.net/human_resource_management_dessler_g.pdf
    • https://s3.amazonaws.com/pavujiniz/2832649708.pdf
    • https://s3.amazonaws.com/warapagefasovi/honda_lawn_mower_parts_home_depot.pdf
    • https://s3.amazonaws.com/xoferuzu/33602903505.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_off0000f9e0.bin
342ef953c087fab16b3228aa8f51a1cf8d323af2dc2f353d7980d35dd8b3c0e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E0 5564 bytes
font_01_sfnt_off00010cd6.bin
6956f7d0641e79135d65e26dd6dade1b56ca672696631f482e553e129b5eab7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD6 12796 bytes