Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d8da6587bb0393…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 13:10:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9bae7d9fa7e3459a540ec7b9107e7138 SHA-1: 15dfa3ac1c94c158940d928f305dfdce302e414b SHA-256: e5d8da6587bb0393a794bcc1cb06fc6e1d385d44320316696afd95adc5aaa9ee
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/award?keyword=free+keto+meal+plan+for+beginners+pdf PDF link annotation
    • http://lukisasore.mywebcommunity.org/oscillator_strength.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/jjbe2nH/9429292092.pdfIn PDF document text
    • https://cdn.sqhk.co/vizejagojib/jhhhgiM/wuxufos.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/wBZJ0ig/29163577558.pdfIn PDF document text
    • http://nutristrike-shop.ru/69809791803mgv1g.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/8NsJmic/savvy_deals_coupons_promo_codes_home_screen_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/Ncwgg4u/ribazaf.pdfIn PDF document text
    • http://maewallace.com/cradlepoint_ibr600b-lp4_router4ddgg.pdfIn PDF document text
    • http://micrometerdigital.xyz/69076019726qbotj.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/61bd9502-aa25-4cbe-8a6b-25f211acf2fa/24573038933.pdfIn PDF document text
    • http://zapusov.atwebpages.com/36104578892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de79bb64-9e21-43e5-9d5a-a577a369e06d/axial_scx10_ii_rtr.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_1d96d8e55241451fa02414e5af098474.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b0dda2-a60e-42a6-addd-479f1aff22c5/mouse_and_keyboard_recorder_crack_serial.pdfIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_76c1e75386e34265bee1e5302ed60e94.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe40c99-aa76-4d6a-ad9b-1cc7d38447a1/bushnell_telescope_voyager_78-9930.pdfIn PDF document text
    • https://92e0cadd-ca3c-497d-ba7d-1aece6ee6da0.filesusr.com/ugd/008e52_9633adb6a8654be284d4c8f4242bd03c.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 5520 bytes
SHA-256: 3d0a82b10f3fc061f545e9c7fe0c9e0ec8d1f53db92b21d6a8161db41349274f
font_01_sfnt_off000110ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EF 10916 bytes
SHA-256: 93d22dc8145bde3f2b980c98fbdc6cf254b45c81401f9d959a6ad6ef07d119c1

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