Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3ae876127652e0…

MALICIOUS

PDF

88.8 KB Created: 2021-03-15 07:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e7931636e6f588630f73d5f578a90c76 SHA-1: a123de5331cd26a3fa4fc678e83d58baa5ac8594 SHA-256: ab3ae876127652e0b619d2737139e472ea7ce5eab22ff2eec290c5415088bf34
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/award?keyword=the+curious+world+of+calpurnia+tate+pdf'. This URL is likely used to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF is a strong indicator of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/award?keyword=the+curious+world+of+calpurnia+tate+pdf In PDF document text
    • https://cdn.sqhk.co/wemorapi/SjgiiXH/best_2_player_games_on_ps4_free.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/judodenenifitok_pijafomago.pdfIn PDF document text
    • https://bobusenig.weebly.com/uploads/1/3/4/8/134866704/8032864.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/Mhehiij/depugajiwukunewomi.pdfIn PDF document text
    • http://mejumeroxara.mywebcommunity.org/quin_es_el_espritu_santo_y_cual_es_su_funcin.pdfIn PDF document text
    • http://kevareso.iblogger.org/anna_karenina_deutsch_download.pdfIn PDF document text
    • http://lemafesopeposuz.mywebcommunity.org/centrifugation_of_blood.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/hexJ4jL/4695857370.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowofiz.myartsonline.com/ralojawesowu.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/18481048952.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/29198383006.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/wookiee_ecommerce_html_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c6ea4d1-390f-4094-9f3a-dd00007ee8ff/life_skills_lesson_plans_for_adults_with_disabilities.pdfIn PDF document text
    • http://negatesuxa.epizy.com/breville_smart_oven_pizzaiolo_pizza_oven_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90190bef-97d8-41d3-b365-6f92f5e700f1/nijanib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f08966-8d4f-4ed1-a123-2dac1dc81dd9/japan_resigned_from_the_league_of_nations_after_it_objected_to_japanese_aggression_in.pdfIn PDF document text
    • http://bulanorimene.rf.gd/21679115424.pdfIn PDF document text
    • http://nezixaleweku.epizy.com/zadozekopurikilonagesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb2e682-6ef7-42cd-b44e-4b0771ec2cb4/hindi_bible_verses_app_download.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/bokituki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a12241-b64a-4162-86ef-eb4bc7edc03a/91350782553.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_off00011aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEF 5284 bytes
SHA-256: f07b37f10f4683d59542965794dde150b0d41a017c0673e1c07b6d38b0b992a6
font_01_sfnt_off00012cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF7 12524 bytes
SHA-256: bf8b737d2436d9c9056aa664d0f75eb3f0fcd793314dd51168d414c6d157bd1f

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