Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d12768910144b3…

MALICIOUS

PDF

70.0 KB Created: 2021-03-17 20:33:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a973d68fa170498354938097de0b6da2 SHA-1: 5935a41e735db4799cbbb55d6449b9e26a834f24 SHA-256: c7d12768910144b3e88e8a4e7978521c13f1d8fa29bdd0a178d32d6290182c4a
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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://leonvi.ru/wix?keyword=wonderbug+theme+song PDF link annotation
    • http://peteferix.mypressonline.com/zuxabim.pdfIn PDF document text
    • http://talkme-news.info/kindergarten_worksheets_coloring_pagesqiaen.pdfIn PDF document text
    • http://koteyarn.moscow/dragon_age_inquisition_cassandra_skill_guidene0gg.pdfIn PDF document text
    • http://mugedly.xyz/ikea_lagan_dishwasher_installation_manuals3jwj.pdfIn PDF document text
    • http://bullbananavannaone.xyz/hypernatremia_treatment_guidelines07liq.pdfIn PDF document text
    • http://markettop.pro/bathukamma_songs_videos9frqx.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/engineering_mechanical_drawing.pdfIn PDF document text
    • http://chategratis.online/algebra_revision_worksheet_ks3dnc0j.pdfIn PDF document text
    • http://lonedowubolile.iblogger.org/when_should_green_onions_be_pickled.pdfIn PDF document text
    • http://netewe9.xyz/ocr_a_level_chemistry_breadth_paper_2019bmq5n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453891/normal_6028ee87438ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470975/normal_5fcd02691de43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_6009e9fd9029e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vufobaratoja.epizy.com/26839894071.pdfIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/podokepokunanub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efc8d8c5-9ea5-41a6-aa17-2396ee075612/left_side_of_the_brain_functions_stroke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0528113c-fa36-4d09-be64-7083e66915e3/yaesu_2900r_mods.pdfIn PDF document text
    • http://vipoxegoto.rf.gd/can_any_vizio_remote_work_with_any_vizio_tv.pdfIn PDF document text
    • http://zozadugaweguj.epizy.com/mixoxazababekudez.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_off0000d4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F3 5148 bytes
SHA-256: e3b0ded72ce8525eb36323ee0e174bea37420644670fabaf15c51e1b65da971a
font_01_sfnt_off0000e658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE658 10788 bytes
SHA-256: d0b7052d0fb63ac33941fc3020afff4cfef424cd7637b71a00f184dac43aa596