Malicious PDF — malware analysis report

Static analysis result for SHA-256 48abbcacda7b661a…

MALICIOUS

PDF

88.8 KB Created: 2021-03-27 21:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 196004bc03b33f6df03f93d30ebf5b35 SHA-1: d9b5d87622853b6244e14fdbddc7f2c5d2e35802 SHA-256: 48abbcacda7b661a6334b045b7ec1ee072b2f57dd02aceb8efd657e21f4359f7
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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://druttle.ru/strik?utm_term=how+to+make+picture+cartoon+in+photoshop+cs6 PDF link annotation
    • https://cdn.sqhk.co/ranemagesoga/GgcJlaZ/friend_emojis_snapchat_ideas_red.pdfIn PDF document text
    • http://homiak.fun/luxikovepujuginqtlwr.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/xXfiajd/download_gta_liberty_city_stories_lite_mod_apk.pdfIn PDF document text
    • http://instofficial.online/cissp_all-in-one_exam_guide_7th_edition1piue.pdfIn PDF document text
    • https://cdn.sqhk.co/jijipidub/ikkWgfE/fokiso.pdfIn PDF document text
    • http://neuroncraft.online/remington_700_308_tactical_barrel_twist632my.pdfIn PDF document text
    • https://cdn.sqhk.co/jabupexipa/TtidicK/vinux.pdfIn PDF document text
    • https://cdn.sqhk.co/rixakowu/f7geicY/winizapowaweriw.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/TNs9sVq/44552640081.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/idmDWgL/dotevowatof.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
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_ee85ff6758194b10898a695299e9e37c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wemofodi/30400058473.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/los_reporteros_televisa_investigaciones_especiales_2018.pdfIn PDF document text
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_f76e3c932424402493d7a217def7d60c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/def792d6-f53d-4f8d-a5fd-a8b53dc3286c/the_brush_on_my_vacuum_wont_spin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3f8bbb-b0fb-49b7-b668-9628805d45ea/7013812340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32de4296-de86-456a-87d0-f84a0317785d/98692435834.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/delopegirekovikaj.pdfIn PDF document text
    • https://9a4203bb-6ff2-4ef1-9c63-3f113f84a884.filesusr.com/ugd/ea9bdf_840f1b577e204d5a8ac79d7bc1ed1da8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/885b0ff1-84a5-4e16-b6a2-a7fba6648eca/tecumseh_8hp_carb_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/035345e0-6769-43b7-8ede-abada1f077c9/how_to_make_a_good_xp_farm_in_minecraft_1.16_bedrock.pdfIn PDF document text
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_55f55c88ba0f46488433383611113f7e.pdf?index=trueIn 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_off00010d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 5292 bytes
SHA-256: 5e320988d33162b1b459bbfaf1f783cdcc6ee77a4bb343671789bd718824cbe1
font_01_sfnt_off00011f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F35 11100 bytes
SHA-256: d41ace37f3052569d324cb6bc0110c682e27b55f5c8ff27b0b08c7b69a1060cb
font_02_sfnt_off00014542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14542 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c