Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be500063a83777d…

MALICIOUS

PDF

78.8 KB Created: 2021-04-25 00:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a650600d87f58e144cdc2b5aee4fae69 SHA-1: 82c8b44bd3d3d51b3ff1d80821168d5102c886c2 SHA-256: 3be500063a83777d8f7c2452bb6c7922b4815e37fedbd51c1f0473cbd2fd4744
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 0.9998

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://fokemale.ru/strik?utm_term=good+and+bad+effects+of+volcanic+eruption PDF link annotation
    • http://zabovawupe.mypressonline.com/best_air_fryer_convection_oven_combo_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423752/normal_6032a3773db60.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/lgBfXbs/91868624761.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/Qhihhl8/masha_and_the_bear_birthday_theme_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/joraxeneli/gj9gjeD/presentation_brochure_templates_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469101/normal_6012b08b12809.pdfIn PDF document text
    • http://pidijajuwupurop.medianewsonline.com/cell_injury_and_adaptation.pdfIn PDF document text
    • http://moxupasasitote.mywebcommunity.org/b._com_1st_year_question_paper_2020_download.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/ps3_controller_charging_station.pdfIn PDF document text
    • https://cdn.sqhk.co/xifinelire/F8hgas1/streamer_life_simulator_free_download_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474727/normal_5ff0232fb2790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_60274e91325b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486367/normal_5fc7f3b0c4432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388162/normal_6065fd8885af9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_601a9b1ba1649.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakifavu.onlinewebshop.net/an_anthology_of_short_stories_by_b_walter.pdfIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_41dd90d71ce743dc9f2e49d8ad3810f6.pdf?index=trueIn PDF document text
    • http://mowigefugitixa.epizy.com/19352196541.pdfIn PDF document text
    • http://keburebaxoza.rf.gd/bechara_dil_kya_kare_karaoke.pdfIn PDF document text
    • https://153f2bed-3501-4ec5-9468-ed1987511f6d.filesusr.com/ugd/f67134_d31cce4f6c6945f4b33a8e8ef983b995.pdf?index=trueIn 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_off0000e1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FF 5380 bytes
SHA-256: ca56243778e982b6ca9215774bd8915c85143510ecd080f907a357b4811efc7b
font_01_sfnt_off0000f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 10516 bytes
SHA-256: cdb6dc6e42b73d0e63fe1050336c4021c2fda5b3fb7d3f3bdaa53ee1aec9728e
font_02_sfnt_off00011852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11852 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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