Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc1a1d67240fb9d…

MALICIOUS

PDF

77.3 KB Created: 2021-03-14 13:09:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 55232095931e0e760a3c2fb2d758a6a9 SHA-1: 481c126422bc7aa2d7af51b35ff02ef7cd9e3646 SHA-256: 5bc1a1d67240fb9dc0e5858e69c23e7ff9ae5057d3b560b60a9f288966e897f5
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=atomic+model+timeline+ppt PDF link annotation
    • https://cdn.sqhk.co/tokarikadez/7zijien/pineapple_pen_guy.pdfIn PDF document text
    • http://minuette.me/kujesukadepemij26zrf.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/9965796.pdfIn PDF document text
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/c3d512c.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/is_coconut_oil_non_hydrogenated_shorteningzop37.pdfIn PDF document text
    • http://webmastervlad.ru/navy_officer_recruiting_station_near_meetbku.pdfIn PDF document text
    • http://unosital.space/math_worksheets_for_grade_5_dividing_decimalsqunxw.pdfIn PDF document text
    • http://cardioactiveitalia.site/beginners_running_plan_for_half_marathon731be.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/dijmHjc/love_ringtone_download_mp3_pagalworld.pdfIn PDF document text
    • http://basiditdcf.space/reading_ielts_examm0sw0.pdfIn PDF document text
    • http://balifruit.com/69456534313udoa2.pdfIn PDF document text
    • http://ihsteam.ru/fegesofosumefuvonulozhj57.pdfIn PDF document text
    • http://byt-upak.ru/suwirunugubugo2jydt.pdfIn PDF document text
    • http://goldotzyv.ru/angrist_mostly_harmless_econometricsl2gyy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466662/normal_5fea3982ad060.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/eogd7jf/boomerang_movie_score.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417526/normal_5fc7749323033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491159/normal_5ffd7432ec834.pdfIn PDF document text
    • http://in-arenas.com/29676727981ihn9b.pdfIn PDF document text
    • http://naturfresh.space/the_rack_workout_station_schedulew67tb.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://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_off0000e5e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E7 4512 bytes
SHA-256: 6d326aacd9b2cf0a7eb01ae973dac487f00eb0cb2843239c00f42a3b7bcc981b
font_01_sfnt_off0000f520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF520 10872 bytes
SHA-256: ec38419d7e7a478772da695f13846db448db2b6f9acd846e4f5e6edaba4ef326
font_02_sfnt_off00011a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A00 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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