Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c669fa1849818d9…

MALICIOUS

PDF

78.3 KB Created: 2021-03-23 21:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 241a1cf069c2fa2e7b56c929b1b0cf0d SHA-1: 1cc24c9abafa68e1f072720976d29a42b7606304 SHA-256: 4c669fa1849818d9338df85c6fd59556ec369e0602769830f09e5f6d95ac1fc0
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 0.9996

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://zajinet.ru/wix?keyword=dish+guide+not+showing+all+channels PDF link annotation
    • https://cdn.sqhk.co/guzufaseba/iezghEe/best_on_tv_right_now.pdfIn PDF document text
    • http://mofadoludive.22web.org/78362410284.pdfIn PDF document text
    • http://ca-manalapan.space/38480729138weytr.pdfIn PDF document text
    • https://cdn.sqhk.co/takulowizi/hejjjhO/48008032226.pdfIn PDF document text
    • http://vuzisebepuda.iblogger.org/49243379903.pdfIn PDF document text
    • http://natlegend.space/972383799319hzr0.pdfIn PDF document text
    • http://baugroup.info/xumuxitafijoxapelobomunad6vgu.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/caAciiz/adobe_photoshop_camera_raw.pdfIn PDF document text
    • http://lulumel.66ghz.com/76071224858.pdfIn PDF document text
    • https://cdn.sqhk.co/xaloxezajaga/hjiheib/32854633176.pdfIn PDF document text
    • https://cdn.sqhk.co/dunokufimove/jbkqiIR/bunedoxopodutubizuzix.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/fd122f8c-6b16-45a6-a2e5-5b516bfd7f10/computer_network_systems_and_database_administrators_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/msi_b450_bazooka_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9dde1d-aeb9-4c53-8614-740c233f295c/36892133781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8bff54-2b02-4668-a5ca-3aae8f985de1/98251486319.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/minogorupafiginotuzudof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38a4737-640e-4f73-9684-752ff0f9f457/38409977562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe51e90-788f-444a-9bd0-7b00522c5e5f/janezopalaposu.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/49917994099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6275575-ae72-469d-86c9-1102ffcfc2ab/verbos_regulares_e_irregulares_en_pasado_simple_y_participio_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d6a6d3-b290-4b25-a8d1-65bbaa6c2211/77908822506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e178b78f-9fe5-44f9-81be-041412a4ecc4/remington_700_stock_mounting_screws.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_off0000f32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32E 5196 bytes
SHA-256: 0ef423a3d950a05099e13c9d58c612406a48a475b3cefda41121d9a0658e5fab
font_01_sfnt_off000104f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 11456 bytes
SHA-256: 63dc0a05f262b41f13c02079446bd43f70a3c5da77ff57af2181679fb872f02f

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