Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4d2143190f05d0…

MALICIOUS

PDF

98.6 KB Created: 2021-03-12 02:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bedbbbee05bf3e2afcf783a996e1adfd SHA-1: e3a0f1796e019a36b08941e0854bbee475a4a717 SHA-256: be4d2143190f05d0836c850d6dcbd61404bd8d5bce77831e1b50916b74d52fc4
166 Risk Score

Malware Insights

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

The sample is a PDF document flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document content likely describes fraudulent financial instructions. Although no scripts were extracted, the presence of numerous external URLs, including one pointing to 'botokaw.ru', suggests an attempt to redirect the user to a malicious site for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/wix?keyword=accuload+iii.net+manual+espa%25C3%25B1ol PDF link annotation
    • http://vodizurulenega.mypressonline.com/why_wont_my_laptop_turn_on_unless_its_plugged_in.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/which_is_the_best_b_complex_tablet.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/dyson_dc39_vacuum_head_not_spinning.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvapolaxaj/hezidik/doom_movie_2019_rotten_tomatoes.pdfIn PDF document text
    • http://komakukamuduwi.iblogger.org/64219867037.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/tZOjihg/spelling_and_grammar_test.pdfIn PDF document text
    • http://lusolakidareve.mywebcommunity.org/analytical_mechanics_fowles_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/81tjijd/sovobebevovosozed.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/Mg2hcNe/folemomeweforopajor.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/ieMSahc/lomutem.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/bible_commentary_app_for_pc.pdfIn PDF document text
    • https://zofenegug.weebly.com/uploads/1/3/1/6/131636866/deloduxojemoj_virufokusulufu_zizepiziz.pdfIn PDF document text
    • https://lejonelawubuw.weebly.com/uploads/1/3/1/4/131453657/dulojuwizalol_fakekiwiw.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
    • http://www.daltonmaag.com/In PDF document text
    • http://xumuritikoxuk.myartsonline.com/how_many_calories_are_in_a_sonic_cherry_limeade.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/49205095892.pdfIn PDF document text
    • http://wabipoxagapez.rf.gd/62414755167.pdfIn PDF document text
    • http://masemipeba.myartsonline.com/angiosperm_file.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/financial_administration_act_2003.pdfIn PDF document text
    • http://zibelasavu.atwebpages.com/a_clash_of_kings_weebly.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/a_color_of_his_own_art_project.pdfIn PDF document text
    • http://nupusadulawux.epizy.com/sample_ballot_for_barangay_election_2018_form.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/55348576904.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12311 1684 bytes
SHA-256: 51fdace8bd53b7d2e6af2c0ab3a57c298b99a0f760d42a36c32010743562cd6d
font_01_sfnt_off00012b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B75 5240 bytes
SHA-256: eb91b3dea513cea7c5205e17d77787376ae94f589a888864be1c47bfce68a4f2
font_02_sfnt_off00013ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE8 15284 bytes
SHA-256: 2e45ab3a2e4eae6b75ace9dc3abe802e5440221a8953bbe62d5ee29cce02caf4
font_03_sfnt_off00016bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BEF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34