Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7915b19d975725…

MALICIOUS

PDF

74.6 KB Created: 2021-03-15 00:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5be3a70868a0e3e0c5eda951533e2549 SHA-1: 997139d1c9f710d90db8b360051f2e9ea7ad69c5 SHA-256: fb7915b19d97572518372661957d01f726f9d8433623edf580908351566098de
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it uses an SEO redirector for a 'free-download phishing' lure. The embedded URL `https://baarspo.ru/123?utm_term=arundhati+tamil+movie+songs++masstamilan` suggests a social engineering tactic leveraging popular search terms to disguise malicious intent. Although no scripts were explicitly extracted, the PDF structure and malicious detection suggest it's designed to lead the user to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/123?utm_term=arundhati+tamil+movie+songs++masstamilan PDF link annotation
    • http://jaxagogilexet.sportsontheweb.net/wivitewumal.pdfIn PDF document text
    • http://gulidomirebo.22web.org/computer_repair_cost_philippines.pdfIn PDF document text
    • http://bidetoluji.getenjoyment.net/81428104219.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/iYfvjgJ/58759002366.pdfIn PDF document text
    • https://cdn.sqhk.co/kamupudoro/jdgjjam/money_saving_tracker_52_week_challenge_2020.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/constitutionality_of_restitution_of_conjugal_rights.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/cjgXKgi/ringworm_rash_causes.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/iqhghjh/power_hover_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/ieifCl5/weekly_sales_deals_coupons_i_heart_publix.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
    • http://giwaxavuf.epizy.com/64860642341.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/comic_box_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/bottle_feeding_guidelines_nhs.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/business_information_systems_degree_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/guided_tours_from_melbourne.pdfIn PDF document text
    • http://gemiwojo.epizy.com/simple_capitalization_table_template.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/how_do_i_check_my_driving_record_in_ma.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/lanyard_template_ai.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/traduction_allemand_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/bajrangbali_song_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/math_worksheets_multiplication_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/norelco_s9000_prestige_replacement_head.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/dnd_5e_descent_into_avernus.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/drosophila_melanogaster_lab_report_usf.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/29946959543.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_off0000d8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BF 5172 bytes
SHA-256: 9c5fcd2cd5ef702f83fd003df05813fe54f3208b4db9652ae0c8f865ed781886
font_01_sfnt_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 10228 bytes
SHA-256: f09b8ee830d209d0619565d6a3718bfc654b80a5094c9f273991838c334c3866
font_02_sfnt_off00010cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3