Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3562c39377d6dc…

MALICIOUS

PDF

72.4 KB Created: 2021-03-03 23:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a9d5e541ae4e6cac9c1aff5da76f9c1b SHA-1: f4984e5b03227624c74e51f7b0c5dd4a02ad0406 SHA-256: ad3562c39377d6dce654aa25123fe317fc72ba97407a57b0c46c17a924a0e19b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/wix?keyword=angelina+jolie+hotel+siem+reap PDF link annotation
    • http://moitender.org/61469271887vu4c4.pdfIn PDF document text
    • http://dkmz2.club/588904944215bxu8.pdfIn PDF document text
    • https://cdn.sqhk.co/gadakoferupa/FijgfOi/36835362746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_5fdc4591ca842.pdfIn PDF document text
    • http://polfact.site/98351130322rlw42.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/ibZjige/70482359893.pdfIn PDF document text
    • http://milanomoda.site/ielts_speaking_topic_vocabulary_20_topicspepyv.pdfIn PDF document text
    • https://cdn.sqhk.co/lebinezekoma/nigMijU/phone_ringtone_rock_music.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/ea0594c93.pdfIn PDF document text
    • http://rfs.team/vabewrawt0.pdfIn PDF document text
    • http://kupivse.xyz/women_s_world_cup_skiing_live_streamingub641.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/r0hd4if/nhl_hockey_schedule_for_tomorrow.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/0p3Unjc/tom_and_jerry_characters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobobowu/arabic_language_learning_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/lab_report_7_epithelial_tissue.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_off0000de98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 5296 bytes
SHA-256: 9c2e02d15ddca7ab7498b4f6b59a041884f0c6bee6424d4375bc518f1e9bce1c
font_01_sfnt_off0000f079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 10652 bytes
SHA-256: 534a6db1f35b025e03f620036da200a7c57cf705b56dca05dc6a17fc72547cbb