Malicious PDF — malware analysis report

Static analysis result for SHA-256 e510712d77bced62…

MALICIOUS

PDF

86.4 KB Created: 2021-04-30 07:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf5d34cc6a20e3b813352155b79494d6 SHA-1: 2b4a917e417f615f1900cdf69bed81244311d708 SHA-256: e510712d77bced622edcdf3867d0c3cd39ec34ceb71b1609ffddf44423185fc2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are disguised as search results for products, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or malware delivery. No scripts were extracted, but the PDF structure itself is used to host numerous URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/strik?utm_term=sanyo+42+led+tv+price
    • https://cdn.sqhk.co/zebenane/ccvvheB/22293317926.pdf
    • http://sutovuresas.mygamesonline.org/adobe_premiere_pro_cc_2020_classroom_in_a_book.pdf
    • http://joxezorov.mywebcommunity.org/86946446782.pdf
    • https://cdn.sqhk.co/xetilibul/iicNbgh/free_dragonfly_illustration.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_0d8c42be667e437cb756e822f1facd46.pdf?index=true
    • https://s3.amazonaws.com/mexesazaxasa/pitak.pdf
    • https://s3.amazonaws.com/wejuvono/74588421155.pdf
    • https://s3.amazonaws.com/matogapibelifiv/72882415439.pdf
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_ae967a37e3ed4a109e85d105c57f77f7.pdf?index=true
    • https://s3.amazonaws.com/bokelur/facebook_ads_report_a_problem.pdf
    • https://s3.amazonaws.com/tuxenipup/brooklyn_s_finest_movie_480p.pdf
    • https://s3.amazonaws.com/tifuwuw/corrugated_plastic_sheet_home_depot.pdf
    • https://uploads.strikinglycdn.com/files/8b42dc24-af47-4f1a-85cc-e772fb40db74/taylor_gs_mini_for_sale_near_me.pdf
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_623d60eb4f8244cd9f08489f3c786aa1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/203352b2-bf12-47c9-b84c-f845c11e971e/23418840631.pdf
    • https://uploads.strikinglycdn.com/files/af735372-61e6-4e83-bf1b-ce1468eb069e/74579840451.pdf
    • http://pelebirepopo.onlinewebshop.net/48828308785.pdf
    • https://s3.amazonaws.com/zizene/raparuromumonidifiwik.pdf
    • https://s3.amazonaws.com/tikoweravisixu/velleman_how_to_prove_it_3rd_edition.pdf
    • https://s3.amazonaws.com/bulalowisu/291328021.pdf
    • https://uploads.strikinglycdn.com/files/af79f28c-0d79-44a6-be1c-2e83582ebde9/50311310649.pdf
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_de83dbefdde54870a81fb4ce5a9d8995.pdf?index=true
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_641acfa65dba40ea9c049660751dbad7.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbd2.bin
4a69630c9c742d42ee826696cac9bb34a5399e2e2b412d1c64d87997994dbe4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD2 5376 bytes
font_01_sfnt_off00010e42.bin
16811f10d4a76a51f7076ce621731cd181dcc949b758b93cc29161f4f528b2d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E42 11952 bytes
font_02_sfnt_off000136c3.bin
10572f3a10760712fbb8352e098d229fd21f48763f52fb6fd9385479015ceb58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136C3 16060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.