Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb996efc38519558…

MALICIOUS

PDF

82.8 KB Created: 2021-04-02 18:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 50d80cf9a5bd595eab41175013d9edcc SHA-1: 52705b7ff55a007cef971cf5e195d019c66c8413 SHA-256: cb996efc385195582bb23991a80657944d2ee44ed0c2f9f3482458a470cfdcf7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Nutrition in pregnancy pdf'. The primary IOC is the external URI that likely hosts a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/strik?utm_term=nutrition+in+pregnancy+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489259/normal_6062dea89eb00.pdfIn PDF document text
    • http://nuveclovet.xyz/penobuxozozovakawuw7a5p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_605d78f45dc74.pdfIn PDF document text
    • http://wiinorama.fun/char-broil_the_big_easy_tru-infrared_smoker_roasterzzucz.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/cathodic_protection_survey_procedures_3rd_edition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421208/normal_5ff7acff3169a.pdfIn PDF document text
    • http://fbcopyright-center.com/annabelle_3_full_movie_in_englishxjeuq.pdfIn PDF document text
    • http://pestore.pro/27009901171zy72a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5ff7d866b41b4.pdfIn PDF document text
    • http://gusevoxuzuwelap.mywebcommunity.org/ikea_micke_desk_instructions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389384/normal_5ffa9f997b9f2.pdfIn 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
    • https://s3.amazonaws.com/sabobenuwe/52882905111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74c1a138-352b-47a2-958a-12bbc062a77a/how_much_are_toy_cars_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531dccd6-0b08-4bb0-92ff-724f70036a1c/city_of_bones_series_first_book.pdfIn PDF document text
    • http://livajurusurex.epizy.com/can_you_make_banana_bread_in_a_bread_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/kepidumu.pdfIn PDF document text
    • http://pujumek.myartsonline.com/harvard_reference_style_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44384deb-496a-4ab3-979e-f2712a8b7958/cva_wolf_breech_plug_for_loose_powder.pdfIn PDF document text
    • http://vivimijo.rf.gd/kesavutiju.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/innocence_project_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090d7f39-23d6-4f56-b860-d010449dfd4e/5_love_languages_of_appreciation_in_the_workplace_quiz.pdfIn PDF document text
    • http://valunat.rf.gd/tudugamenisufukasufofa.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/what_is_diffusion_of_innovation_theory.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/disable_bloatware_apk.pdfIn PDF document text
    • http://tofodubigar.epizy.com/zekenibewageturevej.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_off0000f6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 5064 bytes
SHA-256: a5955d6e1fed4b2eee63ea8c476c5bffcecbb8f142579045b44f9265be1923fb
font_01_sfnt_off00010817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10817 11380 bytes
SHA-256: 40f816e80f89514d6cc89f7330cdb0d3fb4f50e14636cf70e3406d99d58f224e
font_02_sfnt_off00012e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E04 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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