Malicious PDF — malware analysis report

Static analysis result for SHA-256 38940b631fdce3e1…

MALICIOUS

PDF

97.9 KB Created: 2021-03-01 02:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: e86c4dd877313fe1ddc992246ffc7aeb SHA-1: 96902b5cd8aa5cbb2a0ef7cc3231ff90b792194f SHA-256: 38940b631fdce3e1a2023b8d67dcf891fc13877a90ed0aed6058e5b4f9081003
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to download further malicious content or visit a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/wix?keyword=fireboy+and+watergirl+unblocked+for+peasant PDF link annotation
    • http://mainsale.info/mlb_shop_coupon_code5qt1l.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/haGiaih/how_to_write_a_research_paper_proposal.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/GQhb2qr/football_dash_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/ijhiies/hungry_shark_evolution_hack_download_iphone.pdfIn PDF document text
    • http://tiktoktop.design/administrao_de_marketing_philip_kotler_livrosfk5v6.pdfIn PDF document text
    • https://cdn.sqhk.co/varomapit/jhPhgdn/city_car_racing_simulator_2018_mod_apk_download.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/the_twilight_saga_breaking_dawn_part_1_2011_watch_online_free.pdfIn PDF document text
    • http://trysalon.xyz/lexawuxemufijipvmwig.pdfIn PDF document text
    • http://reduslim-eu.site/17586261156ap1jb.pdfIn PDF document text
    • http://afracheat1.xyz/how_to_get_rust_off_grill_gratesg9zzk.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/2011_jeep_grand_cherokee_repair_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/4T94hdH/phone_cover_of_grand_prime_samsung.pdfIn PDF document text
    • http://wizagulonas.22web.org/maze_runner_1_full_movie_download_in_hindi_480p_bluray.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/Enmgfid/triominos_deluxe_uk.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/figofofeseruw.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/alOhbU9/flappy_bird_download_chrome.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/gqNgiEi/24066196669.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wonanikapudidak.atwebpages.com/uma_vida_com_proposito_frases_do_filme.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C92 5676 bytes
SHA-256: 99582f41b33d3ed0bcee562b9455797c93088db080aa23d3a6fc54037b5eb9a0
font_01_sfnt_off0001400f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400F 10812 bytes
SHA-256: 3c8b362456fd98cded8e7f2adec84e7a0e8249a9c9dfd6d9c1b286170d1558ab
font_02_sfnt_off00016539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16539 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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