Malicious PDF — malware analysis report

Static analysis result for SHA-256 e028359c6d85c8c5…

MALICIOUS

PDF

76.0 KB Created: 2021-05-05 23:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 77701d0754f3e3b9b981327b61a14232 SHA-1: 178bfc8cddddfe3623e31595788e7dcd6ee907dd SHA-256: e028359c6d85c8c5a6d04b9df974ad21c81e4b30737d495a103e97b801958fba
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a LOLBin command-execution lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://dugedepap.ru/strik?utm_term=pathfinder+armor+master%2527s+handbook+download+pdf PDF link annotation
    • http://erogancolumbia.site/nikka_zaildar_2_full_moviemqvjc.pdfIn macro / runtime command snippet
    • http://shoop-fr.ru/anu_pgcet_2019_answer_key0qwa8.pdfIn PDF document text
    • http://zaruxejubo.iblogger.org/71602920722.pdfIn PDF document text
    • http://lnstagramoriginal.com/50721848050a75xi.pdfIn PDF document text
    • http://laguduzimunek.22web.org/vatosemanofarede.pdfIn PDF document text
    • https://xidelora.weebly.com/uploads/1/3/5/2/135296398/dozonaz.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://jakartapro.xyz/dark_heresy_character_generatorh1qnj.pdfIn PDF document text
    • http://organic100.fun/steam_tables_thermodynamic_properties_of_waterg8h9k.pdfIn PDF document text
    • http://legendbilisim.com/ti_84_calculator_app_for_androidlrovs.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/af6156d3d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377414/normal_5feb16f6e1554.pdfIn PDF document text
    • http://goodnatural.space/oil_water_separator_design_guidelineskx08c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_605b9a6c735e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450046/normal_60228701cb378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_5fd7a100ce3f4.pdfIn PDF document text
    • https://lafuworopiraw.weebly.com/uploads/1/3/4/3/134341657/3454cb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5fe77800e07b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/how_to_set_a_rip_curl_digital_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/definition_of_cribriform_plate_of_ethmoid_bone.pdfIn PDF document text
    • http://jewigetujano.epizy.com/writing_academic_english_fourth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/what_is_the_best_castor_oil_to_drink.pdfIn PDF document text
    • http://lisodibediv.epizy.com/studio_photo_frame_background_free.pdfIn PDF document text
    • http://norisufa.epizy.com/video_lagu_cintaku_bertepuk_sebelah_tangan.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/16545842633.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/formal_letter_asking_how_are_you.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
    • https://s3.amazonaws.com/muwemivumazuIn macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 5612 bytes
SHA-256: b5665b1cdb5180e39ea39d4bbb38b6ada1001a303ee156e3cb0a70b4c2243268
font_01_sfnt_off0000fbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFD 10772 bytes
SHA-256: 2b64e561cdbfd5430e6645470f425fb7335ac4d9254017f207b2e93bd8e75abf

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