Malicious PDF — malware analysis report

Static analysis result for SHA-256 802dd3c7a2d8497a…

MALICIOUS

PDF

98.3 KB Created: 2021-03-14 18:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b00a2024ebeb37f35fe534720f323c6b SHA-1: 79b5893f56d269467ecac369f87910b94f5e5be7 SHA-256: 802dd3c7a2d8497aaec576dee6f3f359ea995457700159f0407ac290bb548dc4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are to domains that appear to be part of an SEO link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/award?keyword=syndrome+de+gougerot+sjogren+cours+pdf
    • http://fejukoturig.medianewsonline.com/gaxinifixewubopodo.pdf
    • https://cdn.sqhk.co/rojogonezejo/hcQ6ijg/acrylic_nail_dip_kit_near_me.pdf
    • https://cdn.sqhk.co/wobuwaseja/i9hgejd/hitman_go_kotaku_review.pdf
    • http://bumululoru.mywebcommunity.org/36808535759.pdf
    • http://gixodugesu.medianewsonline.com/newiwekadiwa.pdf
    • http://fibisazorowax.mypressonline.com/fofaxotoxebowo.pdf
    • https://cdn.sqhk.co/xuzalolotagi/dCmiche/simple_social_icons_not_working.pdf
    • https://cdn.sqhk.co/nupegefozub/ggd1ABa/69710744856.pdf
    • https://cdn.sqhk.co/bexefoboxevi/iagc8Kn/33557596179.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_ba0810e74147422a8a5717d4430c11a3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/35be56f7-f0ca-472e-9709-dc1c64e71a25/dell_latitude_e6510_user_guide.pdf
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_83d56b93fe64429cba277f09d17802f0.pdf?index=true
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_c24d63ef466d4a17843b464bbed6be53.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1895b3cd-e093-4f9b-b26c-fe04de0e935d/86534214719.pdf
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_c85aeb86803242e680d29ed726186fe9.pdf?index=true
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_a5b3e809804348ab81b263522efe116d.pdf?index=true
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_26c87fb5f8394f98ba5403bed470a3b7.pdf?index=true
    • https://dd67658a-cc17-4e1c-bca5-42bf299a485b.filesusr.com/ugd/07a440_9d106e944edf4399ab4a549f1f94663c.pdf?index=true
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_bd130cfb472a4cbca8adfc4f4fe90a37.pdf?index=true
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_bb5139b3aa434404a522086dca8b7d87.pdf?index=true
    • https://uploads.strikinglycdn.com/files/234b4f55-be53-4b2c-a0da-94a8e152a4d8/14592944379.pdf
    • https://uploads.strikinglycdn.com/files/df786976-a8da-4401-b3ce-002ddc2bd68e/60007907910.pdf
    • http://jezevenakos.myartsonline.com/5559460030.pdf
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_e999d5428c404045a8e4873f794d126c.pdf?index=true
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_84e5f48d639e47b39afc3fa8e3b590e5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f13.bin
0f65d77c9cfbde50ef59676506100fecc284346b6b223024eadea0e787d05dc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F13 5516 bytes
font_01_sfnt_off000151d5.bin
e6d0b3f530fe61d3146d0f2d4e5d87a042b2488bc648ec6a1f226ecee4ea9d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151D5 12924 bytes

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