Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9608461eac6c36…

MALICIOUS

PDF

108.5 KB Created: 2021-04-02 15:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 18963b225ce955d9eb8e4afdd0947cc1 SHA-1: 51ae1be8b68cd159d1a2ba5a2200973307bf498f SHA-256: 9f9608461eac6c36426194fc3ea1f880cd2ecd8589f9cab5142e136c7622463f
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=the+adventures+of+tom+sawyer+chapter+32+summary PDF link annotation
    • https://rugibabolunape.weebly.com/uploads/1/3/1/4/131454120/edae7776656d.pdfIn PDF document text
    • https://cdn.sqhk.co/woleparos/ijT2BCc/ice_hockey_world_championship_2019_quarter_finals.pdfIn PDF document text
    • https://cdn.sqhk.co/xafogatok/jWvHSw3/weather_station_home_assistant.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/igifjcj/camden_county_college_financial_aid_forms.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/Hqjjjtz/sufudaxiwuzowuvowax.pdfIn PDF document text
    • https://fijisakotapabe.weebly.com/uploads/1/3/4/0/134013267/kilulifejev-kapawufuvosokuk.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/ZN6nBid/looper_infinite_apk.pdfIn PDF document text
    • https://zavodazokexa.weebly.com/uploads/1/3/4/6/134632977/4a7aea3d1ba0da6.pdfIn PDF document text
    • https://cdn.sqhk.co/titolegun/KXTM9hh/universe_360_view.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/7687f7c8-123c-402b-a85d-28e5fcc6f02d/noxowavosimuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0092bf8a-46d7-4a68-8ed9-e42dc68230f4/kajafipugutematuwu.pdfIn PDF document text
    • http://sofiveza.rf.gd/28309307787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf27263-9586-4cb3-a899-53fc23da060e/59319262864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668054fa-0904-49e8-a434-5c002ca8906f/powermate_generator_6000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7906af7-16af-4796-b2bd-5ce7af2cf8d1/tifisutawaput.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bca79e4-c8d0-4207-b619-e922df11325a/21760949587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d227d818-71b2-4baa-bf4f-1a04c8e48b5b/unabomber_manifesto_newspaper_for_sale.pdfIn PDF document text
    • http://puwagof.rf.gd/bendy_and_the_ink_machine_free_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507d6a14-612f-4309-9361-6659da832978/linux_shell_script_for_all_files_in_directory.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_off00016be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BE6 5864 bytes
SHA-256: e5a674bf5dbacf24eff4ef0701196871512a7982dbb242f45ad26c16fc30888c
font_01_sfnt_off00017fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FD2 10480 bytes
SHA-256: b0b161392993a72c8a9fdf5c4bcc5dfb702dab785805c5f3c44ed8d6526070a0

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