Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d8d02be0b20f1e…

MALICIOUS

PDF

80.9 KB Created: 2021-03-11 00:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cc893db77ae210a8d41864fcb1619bb SHA-1: d9d23f0cda7ebd9b2a25b5b416fcec141b49f019 SHA-256: f6d8d02be0b20f1ed35897a21ecffeb05510d883fd31deee11b509e58bbbca9e
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'vilenefex.ru', which is likely part of the malicious payload delivery. The document body, though heavily obfuscated, suggests a lure related to marriage biodata, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/123?utm_term=muslim+marriage+biodata+format++pdf
    • http://capridigi.com/402163389804t8bg.pdf
    • http://fastdonwload.space/31143602774ixbqu.pdf
    • http://ompala.store/619661855233xhbr.pdf
    • https://xetutimi.weebly.com/uploads/1/3/0/9/130968997/mozopuk_muloro_pifemaxawuledi.pdf
    • http://begemotiks.fun/461825975290s5jx.pdf
    • http://getveran.site/mitx_6.00.1x_introduction_to_computer_science_and_programming_using_python_midterm3spk4.pdf
    • http://mediaverifiedbadge.com/clases_de_guitarra_avanzadam9mj5.pdf
    • http://dawaferip.iblogger.org/bio_data_form_for_job_application_word.pdf
    • https://gededojoseg.weebly.com/uploads/1/3/4/3/134341448/wetokulasuzebal_rogexupazuneb_digidurolosifeg_pitebepuf.pdf
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/goxeveviwutipodebol.pdf
    • https://resonorur.weebly.com/uploads/1/3/4/8/134874279/motikimo-budobatajuroze-pazokofaxanelep.pdf
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/gidagav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bef3bc3e-8a51-46f6-8a87-0064407a904c/how_to_use_bestway_flowclear_filter_pump.pdf
    • https://s3.amazonaws.com/sezewu/jegelanuvusekopufowesak.pdf
    • https://s3.amazonaws.com/jifesu/10704001440.pdf
    • https://s3.amazonaws.com/libusamagowuvo/baldur_s_gate_2_ee_npc_guide.pdf
    • https://uploads.strikinglycdn.com/files/17f2a857-d49c-4a6a-8d69-e1cb8ab532ee/ti_nspire_cx_cas_student_software_activation_key.pdf
    • http://zexaxenobu.rf.gd/is_internal_audit_a_good_career.pdf
    • https://uploads.strikinglycdn.com/files/714b394a-5792-4526-b6ce-ba0afc81094b/can_you_build_legs_with_calisthenics.pdf
    • http://zavipazo.epizy.com/android_emulator_windows_8._1_64-_bit.pdf
    • https://s3.amazonaws.com/tufitijinexu/40772214511.pdf
    • https://uploads.strikinglycdn.com/files/642b9258-f564-44f6-babe-5becebad8fb1/xibivivibuja.pdf
    • https://uploads.strikinglycdn.com/files/ed3c3d2b-f35c-44ec-b8cd-bbc2fc96b584/voleledofamizusozop.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_off0000fc7d.bin
6c6569846deb46ed935a209415bca67c973e9f4e48a42addb4a712f0f57334fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 5508 bytes
font_01_sfnt_off00010f22.bin
6cec36f0053b5ae95f9b708c750a34f35998e5e900d60b1ea5f66134541b9074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F22 10812 bytes

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