Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5463ce64d17498…

MALICIOUS

PDF

78.6 KB Created: 2021-03-05 18:08:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 268f8ba7951b7fb0f52bfe080ce82a1c SHA-1: 8934206e418560e622bb07c2526306167dfe969c SHA-256: df5463ce64d17498033cb814b89b7f173c66be44cfc89a46c2de596f3a3f071c
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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://jottigo.ru/wix?keyword=volcanoes+and+plate+tectonics+worksheet+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381289/normal_601fa8ae4941f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_6017c5d7509ab.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/painting_classes_near_me_for_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/bzJLjiy/fagumupija.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/bbgY3X0/48091709571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369648/normal_5fd195bcb2a6f.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/98814068004.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/JKU5Vhf/punazuzavenefexepijipovud.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/lang_leav_quotes_love.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/pakaserejimeripod.pdfIn PDF document text
    • http://tapidiv.medianewsonline.com/4462965326.pdfIn PDF document text
    • http://gexedufez.22web.org/fovixosuterejiguzu.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/aa_daily_inventory_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488574/normal_602ac00b3d4e0.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/NZicGgg/39090111813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452373/normal_5ff24d92d70aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e8f6cb2-6b1e-400c-8029-99552792b01e/flysky_fs-i6x_ibus_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdcba1c1-accf-4e13-90ab-8bda0970f882/zifunosaxugulijazime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc01cc81-28b9-4750-8ae7-fc68d81f2418/futemebivosobaw.pdfIn PDF document text
    • http://wuxodiza.epizy.com/video_maker_old_version_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab6e66fa-ad3d-4781-8610-9f7a48b1cb0b/jack_reacher_2_trailer.pdfIn PDF document text
    • http://gigonusotomofi.rf.gd/24820071600.pdfIn PDF document text
    • http://mejavifoxeb.rf.gd/lg_wireless_sync_headphones.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_off0000f7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E6 5384 bytes
SHA-256: eb2e2397b9d80674560fe709c320a3ebfdb9070ccf9e26a5b1d81469b3eee41d
font_01_sfnt_off00010a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4A 10068 bytes
SHA-256: 3458dc726c41402c55a6270ef06640b1300ba80bf0b6edda72b3fe5447c0c546

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