Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecc4945bdc4548b…

MALICIOUS

PDF

79.9 KB Created: 2021-03-24 13:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5129d5f99f1af54b45b170a14c0bf6dc SHA-1: f75c8b20d58cfb75e80b104873a56f3a9ae83deb SHA-256: 3ecc4945bdc4548b5342b7e04193f1aec9adf08e402057f441b2b15210585f57
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting an attempt to redirect users to phishing sites or download further malicious content. The PDF structure and embedded links indicate a link farm designed to obscure the final destination, a common tactic for distributing malware or conducting phishing campaigns.

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
  • 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://maypoin.ru/award?keyword=weight+lifting+for+weight+loss+male+pdf PDF link annotation
    • https://cdn.sqhk.co/kasuwajavi/jc2NIhf/english_grammar_classes_online_free.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/9291241183.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/fjj3uhf/largest_diamond_mines_in_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/K6YjhbR/moksha_definition_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/aapgc0h/30321440652.pdfIn PDF document text
    • http://meetporte.xyz/jojofuzekaxusax77rrp.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/dimajijebisqjylo.pdfIn PDF document text
    • http://lidudopunabiril.22web.org/xopekigezozajon.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/jhhigdE/bubble_candy_nic_salt.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/enPicjc/school_girl_simulator_mod_apk_rexdl.pdfIn PDF document text
    • http://info-pages.ru/how_to_train_volunteers_for_an_eventeh8k1.pdfIn PDF document text
    • http://vertigoa.online/22084041779m8twu.pdfIn PDF document text
    • http://shoop-fm.ru/who_does_myofascial_release_therapy_near_me9pl7c.pdfIn PDF document text
    • http://artistichomesolutions.com/what_einstein_told_his_cook_2esdt4.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuwitide/hjbhh8k/dragon_hills_2_mod_apk_hack_download.pdfIn PDF document text
    • http://promoocaoameericanas.com/142977774114r6wa.pdfIn PDF document text
    • http://obzorov.site/como_se_dice_violar_los_derechos_humanos_en_inglescqe1c.pdfIn PDF document text
    • https://cdn.sqhk.co/vokalater/iiGThbY/english_remix_songs_2019_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/icLjgkJ/misip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zilowovuv.atwebpages.com/ukulele_method_book.pdfIn PDF document text
    • http://zopefunexot.epizy.com/97244685296.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/62437126389.pdfIn PDF document text
    • http://busajolixaba.epizy.com/where_to_find_network_security_key_on_arris_router.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_off0000faf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF4 5560 bytes
SHA-256: b6e4ca57babfeb94c00a9212d81ab1901b84a8d8e7ffe4a816ef5cd4d7e29a5e
font_01_sfnt_off00010dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCF 10504 bytes
SHA-256: 904865e255b615ce3cba323f2680d8f8c5c6ab96f771ce96a9d38aa75b7326af

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