Malicious PDF — malware analysis report

Static analysis result for SHA-256 43aced545372004d…

MALICIOUS

PDF

66.5 KB Created: 2021-01-26 04:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: dc9008b26884f49a1f02c5c836e0aef1 SHA-1: de91accf399d965a819d8b9b8b28b015bc717257 SHA-256: 43aced545372004dd0c423869807be96b6948e24b84ae17654164eed21717779
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/wb?keyword=tumblr%20backgrounds%20iphone%20xr In PDF document text
    • https://cdn.sqhk.co/patagarinixa/Arlgjie/is_the_heroes_act_getting_passed.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/7ibjjR0/50245442328.pdfIn PDF document text
    • http://madewithsunshine.com/rugivejz1rlu.pdfIn PDF document text
    • http://uanews.website/504934738684w0jm.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuwemiromi/ZPkhejh/fuguvaxuwelumojubijofadi.pdfIn PDF document text
    • http://barashik.space/cutz_barber_shop_harlesdenidsci.pdfIn PDF document text
    • http://organic-ita.space/umc_pay_onlinek9w5b.pdfIn PDF document text
    • http://rankingcoach-seo.com/nozobusewelisenenovom75rh.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/fLPlgjj/85518925510.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/hcOhcjd/75795470248.pdfIn PDF document text
    • http://badge-verification-center.com/lebara_top_up_spainebf4d.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/hWCi0ie/25830198216.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/vinivuxo/html_tags_list_and_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/malefot.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/xonuvosuti.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_off0000c68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68F 5708 bytes
SHA-256: d019399d3faf7b0b2b82dd7132fe7ad2a2acb92e6e250ad0ad33c0af07113473
font_01_sfnt_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 10396 bytes
SHA-256: bd9b2c2329d8f6bc73a971b8e011264c68753417086f603284980b21b8eea6e4