Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b913da00dc5f69…

MALICIOUS

PDF

81.0 KB Created: 2021-03-16 22:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d96af6056f8d9689b7eea5126b48fb57 SHA-1: 59b6996704184ecab7530a6675d47667ea493ded SHA-256: 63b913da00dc5f69c5cbdb4b6127aa058080028f92c2504c94a8518d4861de70
186 Risk Score

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 0.9954

Heuristics 6

  • 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.
  • 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://soxebez.ru/wix?keyword=vision+fitness+elliptical+s7100 PDF link annotation
    • https://cdn.sqhk.co/wimiwupo/jhhaexc/30604379800.pdfIn PDF document text
    • https://cdn.sqhk.co/mafokesaxuvi/iblic9H/bazaar_2018_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/fiev0jH/54908541990.pdfIn PDF document text
    • https://cdn.sqhk.co/negolura/jehapjb/wrestling_revolution_wwe_2k18_mod_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/hcicbhh/aimpoint_t2_micro_mount.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzokikili/ge0wKhd/girl_chat_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/j7jd1lI/wafipujoxidemadilidi.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/cgjdcji/pixel_worlds_mod_apk_latest_version.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dufekifaral/diamond_inama_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/11680375860.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_b157ff21d04e44eca793fe0c33727cd8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38d68ae-5550-4745-8795-5f8cc7ae7934/how_to_make_easy_paper_airplanes_that_fly_far_step_by_step.pdfIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_80055d67e0964c3aa6019a4204b19d42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05246c5d-099b-407a-a5af-e472c98961ad/laruwetidenirugubenud.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_0aec7d747dae4e91984e40a568c02131.pdf?index=trueIn PDF document text
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_8e7f0975f2cf4038abb87b292483e2d7.pdf?index=trueIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_170ea197a0d743de94d5487e1cf3d8c6.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_20fa44450c0d474d8b49502ee49aa512.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5bfe6e-3cd3-4c57-af7d-f3055e6ae77a/2012_chevrolet_impala_lt_for_sale.pdfIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_e9250489146b4e8eb29970fb90137142.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vunizi/sengoku_basara_ppsspp_19_mb.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/metallica_full_album_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07f51594-b4a8-4285-a02a-06e5ae5cd0af/kindergarten_math_workbook_free.pdfIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_493049d3387b40e3888c6a89baedb705.pdf?index=trueIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_5b19df218d1d40bb8892c2543ceadfa8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6db64ca-a39c-4409-b746-a1658f6d77f4/innovative_english_learning_center_karachi_fees.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF77 4940 bytes
SHA-256: 98e231cc661329ea3792eff6284fae86866f4cbacbea05d2bc25bf5e6c84a9f8
font_01_sfnt_off0001005e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005E 11280 bytes
SHA-256: e02fad50851d6012cd86800e6502d9e25517255f6bcb7158c98a71f7dfe44955
font_02_sfnt_off000126c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3