Malicious PDF — malware analysis report

Static analysis result for SHA-256 47768900ae698b4f…

MALICIOUS

PDF

81.3 KB Created: 2021-04-05 15:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2e21acba88386f571beb81aeec7cb12 SHA-1: d695a40f8de99bca8f1722a71f3941a52a49acf2 SHA-256: 47768900ae698b4f277bf6d651b604d8eef3df32973e85d942dc338ac7363f9e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL leading to a site that appears to be a link farm for SEO purposes, potentially distributing malware or phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=clubbers+guide+to+trance+download
    • http://kipivuz.iblogger.org/how_to_replace_hose_on_bissell_portable_spot_cleaner.pdf
    • http://wujaxeniju.22web.org/cetose_dieta.pdf
    • http://murimubijejaba.mygamesonline.org/bemomelosajiwoxugoneb.pdf
    • http://potawuzaj.medianewsonline.com/the_hobbit_book_artwork.pdf
    • http://ganedoxumizaj.sportsontheweb.net/vitovotoduwirel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/nuxepiduded/77560071767.pdf
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_8a57408a8b9f4f6ea38e94f97dd9a513.pdf?index=true
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_a3ec79573a854545b0e54779db2019d4.pdf?index=true
    • https://s3.amazonaws.com/zuguvoxoki/xusuzisutiverikosudawu.pdf
    • https://s3.amazonaws.com/takebemanijewok/comic_relief_2019_worksheets.pdf
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_9dbd529436774298bd801b61f7038d4c.pdf?index=true
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_76fa3b0fd3bf44c8bb954c38f2390807.pdf?index=true
    • http://rugogevegemup.rf.gd/boy_erased_garrard_conley.pdf
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_f953fe5be7bc4e28811625b1c5799999.pdf?index=true
    • http://ziwemasux.myartsonline.com/jaxonov.pdf
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_e4d3d924f9df4b7bb699cac12294117b.pdf?index=true
    • http://zuxamivim.epizy.com/irs_ein_form_ss-_4.pdf
    • https://s3.amazonaws.com/sukobogixe/free_online_bollywood_movies_2017.pdf
    • http://bepibuxel.epizy.com/house_layout_design_software_free.pdf
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_36f9562eb5e044a3a30e5392be2fc682.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04a.bin
4eaf213648f14fb2f43b9e2271b47e2638d19ad58408a584bbde801ddcee4b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 5244 bytes
font_01_sfnt_off0001022d.bin
944647cbf2b13b32a3e8ea2e5e7d95971f8d33f7a0451ebee7d2cb3a89efc644		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 11104 bytes
font_02_sfnt_off000127a9.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127A9 4324 bytes

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