Malicious PDF — malware analysis report

Static analysis result for SHA-256 c681ba8c49ae2b2b…

MALICIOUS

PDF

78.3 KB Created: 2021-03-12 09:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d88668b31b6f4fd0a51be00041c3857e SHA-1: 112f6bbb4f524d09b7d69837d44c35fff88b849f SHA-256: c681ba8c49ae2b2bda5c33b29513c6eea0cddcfe67e2ee22e76c2c27392f7071
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of this file. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious content, likely for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://kuzutuzo.ru/strik?utm_term=troy+bilt+pony+tiller+belt+replacement
    • https://cdn.sqhk.co/korokotuduki/hXrvzif/kogedudagogodiber.pdf
    • https://zixikaro.weebly.com/uploads/1/3/5/3/135301636/2b8a9a110d33.pdf
    • https://cdn.sqhk.co/tosijoxopum/ieChggi/cosmos_neil_degrasse_tyson_netflix.pdf
    • http://universe1.space/pixel_royale_unblocked5tpkw.pdf
    • http://creditactive.info/android_chrome_browser_desktop_modewk4zx.pdf
    • http://securespot.ru/black_and_decker_20_volt_lithium_circular_saweeb3p.pdf
    • https://pujapuvefebawu.weebly.com/uploads/1/3/4/5/134581836/4504594.pdf
    • http://omerkatanalp.com/investment_property_spreadsheet_template_australiahttxu.pdf
    • https://cdn.sqhk.co/niramojiga/PpThhVn/eee_virus_symptoms_in_adults.pdf
    • https://xikemusuvef.weebly.com/uploads/1/3/4/3/134322181/kufakebizugerowuk.pdf
    • https://rixagebama.weebly.com/uploads/1/3/0/7/130738507/931727.pdf
    • https://cdn.sqhk.co/wezupobuwab/wgeo0hc/condado_beach_puerto_rico_restaurants.pdf
    • http://vedice.ru/country_and_nationality_worksheet_eslj56u3.pdf
    • https://kenomipijisax.weebly.com/uploads/1/3/3/9/133986884/6080588.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wovisak/lamapofefem.pdf
    • https://uploads.strikinglycdn.com/files/46e301a0-aa99-4024-a36b-0c77f91099ed/how_do_camhs_assess_for_adhd.pdf
    • https://s3.amazonaws.com/jopomodilamego/local_government_questions_and_answers.pdf
    • https://s3.amazonaws.com/wonumafubij/have_yourself_a_merry_little_christmas_original_song_lyrics.pdf
    • https://s3.amazonaws.com/tisegovofu/on_the_road_again_canned_heat_harmonica_tab.pdf
    • https://s3.amazonaws.com/tabobujimo/1694668735.pdf
    • https://uploads.strikinglycdn.com/files/af855465-6c45-4705-a22d-66b106931d2c/jufeluwuzagutofaraxifugor.pdf
    • https://uploads.strikinglycdn.com/files/8be55d23-2a74-4215-a509-f33bfef656c0/berserk_manga_ending_date.pdf
    • https://uploads.strikinglycdn.com/files/ac4a16d1-53c7-4d7c-bd83-e54648bf59c1/pevosasilupetafumilerezi.pdf
    • https://uploads.strikinglycdn.com/files/1362dd04-0445-4468-b897-57b3e9320e5f/33497829427.pdf
    • https://uploads.strikinglycdn.com/files/d7f44077-8aa6-4905-8210-516623235ceb/36188963262.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f798.bin
7697a9440bf51fd240da99045c908d24ccb4e3a85822abc50dbec6319944482e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF798 5092 bytes
font_01_sfnt_off000108db.bin
ecf66628bcceadc4d9c3ae670bbda57ac07b3e3ac291b533b8dde76d25e80e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108DB 10184 bytes

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