Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c19f9353c42ec2…

MALICIOUS

PDF

68.6 KB Created: 2021-02-24 17:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f1573661b7772e0746f17e29f410018b SHA-1: 72582dc8bc8bc46638dcf1c307a8966cf7e980fe SHA-256: d4c19f9353c42ec2da9056d03b3a1db3936c6ad0c1eba2b3b89df6413f41f6c0
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=comeaux+high+school+lafayette+la+70508 In PDF document text
    • http://natur-green.fun/ibn_sina_pharmaceutical_annual_report_2016xvfh1.pdfIn PDF document text
    • https://vidozalenaw.weebly.com/uploads/1/3/4/8/134875831/7d340d.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/SYkteji/how_to_learn_html_and_css_faster.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/ggjfjix/old_black_southern_gospel_music_youtube.pdfIn PDF document text
    • https://getawotenag.weebly.com/uploads/1/3/4/4/134443600/8ad0e918b4011.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/DjehebR/tagawesurojajobomo.pdfIn PDF document text
    • http://marketitaly.pro/power_air_fryer_oven_elite_instructionsnq4mc.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/ehefdi7/entrepreneurship_training_in_the_philippines.pdfIn PDF document text
    • http://uaregroup.com/sawutedamabelia3mkl.pdfIn PDF document text
    • http://expressday.online/cow_jumped_over_the_moon_song_lyricsp3m6w.pdfIn PDF document text
    • https://rixafivi.weebly.com/uploads/1/3/1/3/131380000/6565708.pdfIn PDF document text
    • http://8gusevshop.website/cookie_crush_2018nabpq.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/davolazupivowi/2502148987.pdfIn PDF document text
    • http://nawevuf.epizy.com/141802216.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_off0000cefb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFB 5812 bytes
SHA-256: 94f65a071338ffedaa3ab615f8fa4f89e675108a95c4cbeedc93c80fa167557e
font_01_sfnt_off0000e2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C0 10212 bytes
SHA-256: 5cee0dc5dec963cbd293cb32437c76ac38f8b5612912e1311f2fde97b5666481