Malicious PDF — malware analysis report

Static analysis result for SHA-256 d147cfdb97c2a020…

MALICIOUS

PDF

76.7 KB Created: 2021-03-18 18:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6d2bb6b45280831194c15230ac8a08cf SHA-1: 5507f50f984977f67b4b3a1a2fe754bef9b77ae6 SHA-256: d147cfdb97c2a0207f80efa43fa45e2d99f155c65c072b93caadaf09dd2c5127
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wix?keyword=laccaria+laccata+look+alikes PDF link annotation
    • http://mexicotop.xyz/como_calcular_metabolismo_basal2qfce.pdfIn PDF document text
    • http://kraftmann.su/tiles_hop_color_ball_3d_downloadkif4l.pdfIn PDF document text
    • http://about-igsupport.com/bank_clerk_exam_question_papers_with_answers_free_downloadorlo2.pdfIn PDF document text
    • http://italy50wow.pro/adobe_illustrator_cs6_classroom_in_a_bookdo2bt.pdfIn PDF document text
    • http://apeech.ru/deginenubimigefexatgllh.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/tamilrockers_tamil_movies_2017vg5qu.pdfIn PDF document text
    • http://idealsit.space/ipod_touch_4th_generation_battery_replacementnb8s8.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://sujotoginejo.rf.gd/consonant_phonics_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788da54e-6ed0-4941-97d0-e1d0a5fce231/idylis_deep_freezer_not_freezing.pdfIn PDF document text
    • http://bituxezemas.epizy.com/reaccion_de_sintesis_ejemplos_cotidianos.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/belgium_league_table_home_and_away_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/76584512725.pdfIn PDF document text
    • http://serekosesera.rf.gd/converter_to_word_download_free_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e541fd-3dc8-4f36-b75f-e77ed86916bd/snow_teeth_whitening_before_and_after.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ec97a1-df42-47a6-85c0-51d9cd9ece77/how_to_learn_photoshop_quickly.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/hcf_and_lcm_using_prime_factors_worksheet.pdfIn PDF document text
    • http://retejades.rf.gd/10151489052.pdfIn PDF document text
    • http://baperosuvo.rf.gd/batman_arkham_asylum_a_serious_house_on_serious_earth_the_joker.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/ceac._state._gov_form_i-_864.pdfIn PDF document text
    • http://roparewuna.rf.gd/sasex.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_off0000e1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D3 4480 bytes
SHA-256: 6873f881656e95d224ed730aa9765c000c954ce76efc52a32c28881a1814ac1c
font_01_sfnt_off0000f112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF112 11524 bytes
SHA-256: b87e68734ebbd9403a3545c116d60aa8c2249adad8639c96bca3ce3ee972ae72
font_02_sfnt_off000117ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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