Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80810abe1f4182b…

MALICIOUS

PDF

78.9 KB Created: 2021-03-22 23:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: dfefa7f48203e54810559665550f23ac SHA-1: d9d111b4f8e354831e6ce9de761ddc962787c1a1 SHA-256: a80810abe1f4182b3b7c3fd45320201da45fad9aeff91f38050e6785faebae73
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attempt to lure users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=adobe+acrobat+pdf+reader+download+windows PDF link annotation
    • http://eushopvmn.site/credit_rating_report_ireland98um3.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/689400896656izur.pdfIn PDF document text
    • https://kudokazapa.weebly.com/uploads/1/3/1/4/131452939/wekilinojag.pdfIn PDF document text
    • https://zexojoru.weebly.com/uploads/1/3/1/4/131409474/a3f8ae3.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/zuvoguda.pdfIn PDF document text
    • http://uber-global.com/69145953600lxa85.pdfIn PDF document text
    • http://albatros-trans.ru/bibiliya_ntagatifu_kinyarwandaerm8p.pdfIn PDF document text
    • http://skout.tech/tuveboge7eeih.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/what_are_the_scales_of_the_mmpi_2gk6c9.pdfIn PDF document text
    • http://topvideo.design/how_much_weight_can_you_lose_on_a_5_day_cleansei74tt.pdfIn PDF document text
    • http://harmony-market.ru/ejercicios_de_presupuestos_resueltossrpw3.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/205506ad.pdfIn PDF document text
    • http://udilische.club/fraction_multiplication_calculator_in_simplest_form3xgwx.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/bopuxosavubare/blackdecker_lithium_pivot_dustbuster_14.4_volt_white.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/4035143960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298f2ab8-b146-4be0-9ad7-abc37dbabe00/how_to_improve_running_strength.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/baptismal_class_manual_sda.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/ye_bhagwa_rang_dj_song_mobilekida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb096911-fc27-40f8-b752-53d7d824cd35/13725484526.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/challenge_telugu_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1e2ea5b-e00a-42e4-aee5-396e521c4089/1434598569.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/csgo_aim_training_map.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/71693153311.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/kenepemolufogezukiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/574106dc-9fbf-4ff4-85a4-9794a78fa92c/total_quality_management_definition_and_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b369a051-aa39-4ae6-913e-950f5524c1df/what_is_the_purpose_of_a_flowchart_in_programming.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 5372 bytes
SHA-256: 6326512d3ddf6e97ef11e4e4fcc9cc986e13e6109fd8561d97f2d306c423bdea
font_01_sfnt_off000107f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F9 10596 bytes
SHA-256: f10340dbfe22c9793d12975c3a615a4ea868494cafd1e0fe2b3567dae2529bc6

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