Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0ba320f5b9dd7b…

MALICIOUS

PDF

71.7 KB Created: 2021-02-28 12:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0f6fb00a10fbddb7c7ff2fb3c755ef5d SHA-1: 2c93bb4b977d3e9ba5a39918e6a8309ad3b454cb SHA-256: 9b0ba320f5b9dd7bb700c3175a6567588d41f44a52847ea106c6ecb4e6fc7ed7
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/award?keyword=5+paragraph+op+order+template In PDF document text
    • https://malosana.weebly.com/uploads/1/3/5/3/135323031/4059380.pdfIn PDF document text
    • https://vutepunuvo.weebly.com/uploads/1/3/1/6/131637517/vijusegudidiru-zoxupaxam-kaxewiviji.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedevatas/gheRDLW/grand_theft_auto_online_download_for_android.pdfIn PDF document text
    • http://dowelatevitik.22web.org/ahuyentar_avispas_de_forma_natural.pdfIn PDF document text
    • https://zagiwesojuju.weebly.com/uploads/1/3/2/7/132712322/fuvewemor.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/cboyd6B/kazerugezepubiloxonewir.pdfIn PDF document text
    • http://meetchambre.xyz/54452821163tgcps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasegusof.epizy.com/41980962819.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/96841926786.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/acer_laptop_turn_on_black_screen.pdfIn PDF document text
    • http://zepizokuxufo.rf.gd/92042585276.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/72947933649.pdfIn PDF document text
    • http://fiwabafedazuv.epizy.com/casio_mens_pro_trek_prg-270-1_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/butterfly_song_pagalworld.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_off0000dca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA4 5224 bytes
SHA-256: 76d305e28aa7b28cd6ab7dc4a3e6af0bfced35bcdc0b3d19c8ea25aee80f0501
font_01_sfnt_off0000ee38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 10596 bytes
SHA-256: 6b556790c6937519a085a4e863a10fa6e6f4e18ec5150f60e1ea6716c00feb14

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