Malicious PDF — malware analysis report

Static analysis result for SHA-256 c333afacdc0fd64b…

MALICIOUS

PDF

76.0 KB Created: 2021-04-17 05:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c08d2081838c51d29e6d45d3e875df3b SHA-1: dd2e89b3a2123d867c8debc61207e6839ff65044 SHA-256: c333afacdc0fd64b30e3a709d2fd379c1830cec0de8d055fda6ae066fe30bcce
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 0.9999

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://mezovuduw.ru/strik?utm_term=cinemate+15+universal+remote+device+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5fe7443e4aa23.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://razidazimako.iblogger.org/pdf_search_engine_for_free_scientific_publications.pdfIn PDF document text
    • http://aydym.club/how_to_hook_up_directv_genie_miniamvl3.pdfIn PDF document text
    • https://cdn.sqhk.co/bareziwo/hhKYhhI/duracell_rechargeable_aa_batteries_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/eNhbhd1/rts_program_2_sutra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_6005075e07b2b.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/y1lIhb2/96886179459.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/a1e6bf3a-90ee-4abc-927b-fb64347db5fb/bejojugin.pdfIn PDF document text
    • http://dokelegusipodi.epizy.com/cbt_handouts_for_anxiety.pdfIn PDF document text
    • https://f43304fd-85e4-489a-8612-81977e01be4a.filesusr.com/ugd/b6f504_858faedc68404d51aef488d8755f9267.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6530890-cb53-4d85-9c95-67d319d94b89/51601971708.pdfIn PDF document text
    • https://52431b39-7396-4b0c-bcaf-ab72d449a1bf.filesusr.com/ugd/f8cef3_b7f0bcf4ca2b4285a0337cab84f08ba2.pdf?index=trueIn PDF document text
    • https://b0b89e74-75d6-43b0-bb8f-fa2cd9bd5f5b.filesusr.com/ugd/b5ae3e_4566d5871c834f6e87ab255d340c0a84.pdf?index=trueIn PDF document text
    • https://041c2bdd-267b-4995-9d72-d071cf2c2b2b.filesusr.com/ugd/ba0b69_69a1e5ec6fe4416f8d78251be3814f08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9146d04c-d777-455a-a90d-73de511ddbff/63418144180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e9bf97-4414-4cf6-a1c3-e714f607899a/8198104008.pdfIn PDF document text
    • https://c9107794-7b31-4e5c-84de-5db174abdfaa.filesusr.com/ugd/aabf5f_9662672a8a2d4b038ecb33b0637f4caf.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_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 5224 bytes
SHA-256: 345bc7b8fd22e70ba725bcafc54f00da0fba2acce8718a6ec0bb99db684dd78f
font_01_sfnt_off0000fce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE6 10600 bytes
SHA-256: 84430e3a9f19e14aa5cb4d1b75a199cb5735a80f5660901a69212a5906eea55e

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