Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc034401ea8b6ee…

MALICIOUS

PDF

94.8 KB Created: 2021-03-09 13:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 111f90baeee6022eb7199dc91a864687 SHA-1: d373342b6cf354c1d8a60608012f65f2b027ad59 SHA-256: 6cc034401ea8b6ee872e615e2fee27021b46270225f8599ee178feb8c9682d28
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=the+sun+in+the+morning+book In PDF document text
    • https://static.s123-cdn-static.com/uploads/4408996/normal_600477f419293.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/BKchgji/39046495257.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/98209442694.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiderubota/h2raWjg/cheap_california_king_bedroom_furniture_sets.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/PjfjaDK/55895237212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365560/normal_5fc70ee8549a4.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisezepemu/ibheVFR/18480054064.pdfIn PDF document text
    • https://cdn.sqhk.co/kawiwitifa/hege7he/pool_table_pocket_reducers_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/jegetito/gigecij/lavadora_brastemp_11kg_ative_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/UbbSCgi/hungry_shark_world_game_play.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/jcahbLr/streamlabs_obs_remote_control_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/Xgiz7nY/tic_tac_toe_family_day_care.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/24db43fd-3676-48e6-9651-36cc15bf736b/nozavurikituvizekukovub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bb05cc-796c-42c2-a152-c03dfcee13fe/taguneliratitalela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b997d0-a86b-487a-97e6-810511e390f5/how_to_program_intermatic_digital_in_wall_timer.pdfIn PDF document text
    • http://wagenugeti.epizy.com/tuxorigotelasines.pdfIn PDF document text
    • http://zopegekole.rf.gd/hotstar_apk_latest_version_5._17._52.pdfIn PDF document text
    • http://libiwozurogufo.rf.gd/viwilimanizixeduz.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_off00011624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11624 5008 bytes
SHA-256: acf9ef927a0954b463170915e0888c6320f81987dc9e16030e222facdf4f6b46
font_01_sfnt_off00012708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12708 14628 bytes
SHA-256: 3108f3a7bf512cf55169f85b5964b4e921f8ad2da93315c28f4c5484f6aa7b86
font_02_sfnt_off00015411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15411 17340 bytes
SHA-256: 82c4456f5d0ab390be71721ffe9c54620e0c5fe594d79c8e8b90c4b9e7844700

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