Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c017e6b2f55bbc8…

MALICIOUS

PDF

77.7 KB Created: 2021-03-28 06:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8545300ccfdeb5b0e52d41e8a3dd0c62 SHA-1: 115d104e0c30399b7260f8169520c3e3936efc4d SHA-256: 0c017e6b2f55bbc8d026233c9466ab9d6235ef831f4e1ca0c3d40ee429edbdc6
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing given the nature of the URLs. No scripts were extracted, but the presence of numerous external links points to the document's primary function as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=cisco+ccna+routing+and+switching+pdf PDF link annotation
    • http://lnstagramverifiedsbadgesforms.com/sharp_objects_show_season_2u9o3r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415964/normal_602fd38487170.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/makupitodinanul-pufuvat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454040/normal_5fdff5a9c6013.pdfIn PDF document text
    • http://leafester.online/53342684588mukpl.pdfIn PDF document text
    • https://dorugemapakew.weebly.com/uploads/1/3/4/6/134680888/zegijumama_tedazuw_bigebivogevum_xodekogufube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_600e3f914d203.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/fafesiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_60160c59361ca.pdfIn PDF document text
    • http://podeves.xyz/72756732618moswq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_5fe90349d6dec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_6046cce67be5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476429/normal_5ff929d98aa15.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/7599705247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456122/normal_5fe1b52695eae.pdfIn PDF document text
    • https://kegovivaxik.weebly.com/uploads/1/3/4/5/134506491/1549924.pdfIn PDF document text
    • http://erogan-oficial.site/48259905752jxj88.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/7471522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_60476ab3ca0b8.pdfIn PDF document text
    • http://torixobo.mypressonline.com/what_is_tcp_ip_network_printer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forojiwimudobo.atwebpages.com/fundamentals_of_database_systems_elmasri_navathe_7th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc96a2b9-47a6-4cba-8fd9-dfde6856955f/tus_zonas_erroneas_english_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532fe801-3707-4d6a-b19b-3d31ab178cb0/dokuvesopazakatebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca7348d-facb-46d4-b402-d4ced255b14d/cosmos_neil_degrasse_tyson_capitulo_13.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157e3625-47fe-4c46-a684-d1b688bb4011/what_does_the_bible_say_about_time_and_seasons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe0c67d-5e70-40c0-a3e8-45efc9ae6165/63296405910.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE302 5380 bytes
SHA-256: d93fb6971a6c406cf2590201cf4e0e308f71dfef1593d34412ed82160371f923
font_01_sfnt_off0000f55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55E 16260 bytes
SHA-256: 79b75283c6972dc920d823348cbc446ee13bf3f7e20408631782d1ce8f4c82a5