Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b6fa5f33453331…

MALICIOUS

PDF

80.4 KB Created: 2021-06-01 18:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d315b4afd0714bfda5d337ed985bf634 SHA-1: a211246644639c8d0b0c566ec9cea458ab1a9cc7 SHA-256: 60b6fa5f33453331f9bcf339a9a8b79ad6c2b5821cb6cb7327d51d4c8d85aa22
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the overall structure and URL patterns point towards a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://catamma.ru/pbw?utm_term=que+es+la+escapula+del+hombro PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459165/normal_6012a7cf6b24f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412599/normal_5fe8336f2bba5.pdfIn PDF document text
    • https://jalesebexiw.weebly.com/uploads/1/3/0/7/130739560/muzogekijesoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_606ca27b4a34d.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/17d87d3bb39.pdfIn PDF document text
    • https://fikijumosoliz.weebly.com/uploads/1/3/5/4/135400707/3654389e.pdfIn PDF document text
    • https://maxojojafeke.weebly.com/uploads/1/3/4/7/134751800/niluru.pdfIn PDF document text
    • https://gazevasodixobex.weebly.com/uploads/1/3/4/4/134437076/puregoraninamedodon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5ffb4db53e1f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464303/normal_5fe51c570d5ee.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
    • http://siruzosu.pbworks.com/w/file/fetch/144449910/who_enforces_coronavirus_rules.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/w/file/fetch/144445353/bunavomowupenepevuwemoz.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/wings_of_fire_starflight_x_fatespeaker_lemon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80542176-461a-4403-ad37-97dca78dca37/how_long_does_ultegra_di2_battery_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ccd35c2-480e-472f-a7b3-2410bb768a98/41843757282.pdfIn PDF document text
    • http://moxulolo.pbworks.com/f/vasekodepadekepixemam.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/what_are_the_4_major_marine_biomes.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/onion_cell_plasmolysis_lab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd80cd1f-a65d-4376-bfcc-8ceaab69faa9/gefuxefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/168f66fc-8865-4ae8-8a23-04f3fcc3e91c/coptic_bible.pdfIn PDF document text
    • http://zexowisam.pbworks.com/w/file/fetch/144426537/44966272907.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144426978/97737793848.pdfIn PDF document text
    • http://tebejeloxid.pbworks.com/f/weber_cutting_machine.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144424383/what_is_the_meaning_of_equity_research_analyst.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_off0000ed5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 5164 bytes
SHA-256: 52a6d04320f3386d6c3de1b299f3f15b2dadbd5fe6d1178f181a58a8b7b0d819
font_01_sfnt_off0000fed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED4 11600 bytes
SHA-256: 93acc6f7e2d1bee546216d376d2b7ac8e7d2ceced2964e41a658934029761d83
font_02_sfnt_off00012491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12491 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f