Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cd706412cfcbc4…

MALICIOUS

PDF

84.1 KB Created: 2021-04-15 03:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8b48ff388fcb2bfbe7f0d3dcfe0cf0f6 SHA-1: b5b5070ef74946b0213fb1c11ee691a29a5e71d4 SHA-256: d5cd706412cfcbc41cdfc47e278874f4b83c24c7100306284043c96f056deeae
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to book quotes, aiming to trick the user into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=i+am+legend+book+quotes+with+page+numbers PDF link annotation
    • https://cdn.sqhk.co/dejijadu/Shgiajb/kimanivob.pdfIn PDF document text
    • https://cdn.sqhk.co/gobefuvumi/qr4amha/best_adventure_game_for_pc_free.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/ielts_5_reading_test_3_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/iTQHial/rolling_sky_hack_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/numisezopo/1gcmig2/davante_adams_injury_report_today.pdfIn PDF document text
    • http://josobagilila.iblogger.org/dd_5e_sorcerer_table.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/iY4jiig/praise_and_worship_songs_2018_with_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/cgjhdD3/best_online_slots_free_spins.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/gQibgjE/life_of_a_princess_story.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/husqvarna_120_mark_ii_chainsaw_review.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/ghHjahi/life_is_strange_soundtrack_steam.pdfIn PDF document text
    • https://cdn.sqhk.co/tawumemikuva/sGxMjbr/standoff_2_hack_download_ios.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/how_to_reset_haier_portable_air_conditioner_without_remote.pdfIn PDF document text
    • https://cdn.sqhk.co/baveninale/iehaJjb/30875107025.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/40567446283.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/base64_string_to_html.pdfIn PDF document text
    • http://farexirofabi.22web.org/zuwezojuwore.pdfIn PDF document text
    • http://virepidutajal.iblogger.org/airtel_postpaid_paid_bill.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/jahjGE8/77082700678.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakapenabu.atwebpages.com/besoritofimedixoj.pdfIn PDF document text
    • http://pibusobi.epizy.com/pejavixaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1edabb8-0576-4031-962a-5c07be05fcf7/cloud_atlas_reviews_rotten_tomatoes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72fe6dae-4be6-4ea8-ac8e-43696b8e2198/carry_on_liquid_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4e6492-b90a-4d61-8ca5-d6e76dfe0c6c/31373059663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f325904f-bfc9-4ecf-b409-00837d609aae/76888513043.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_off00010a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 5732 bytes
SHA-256: 5aa7d1517f11df636a4010ae1ab88e4fb8ad8a2d16904c142f68ff18425bceff
font_01_sfnt_off00011dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD9 10744 bytes
SHA-256: ede66eb748183bfa2b7f99f44ce8715767f6fa1cd56bd89cfbd53d2180814754

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