Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89aafb26a943189…

MALICIOUS

PDF

71.6 KB Created: 2021-02-17 12:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2077f328b39a90e8bba1b18c9fa3a5c7 SHA-1: f8ad1f1eadc210f5c736cc93797798c1a599b0df SHA-256: f89aafb26a943189b31455e414de23fc91b462f43906b52b394d92e6dea3a0ea
196 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.
  • 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.
  • 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=rodeo+carnival+tickets+austin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453335/normal_5fe7a2be2b964.pdfIn PDF document text
    • http://familyit.pro/bollywood_hd_video_song_pagalworld._com_2017x8zmz.pdfIn PDF document text
    • https://furedanoduribi.weebly.com/uploads/1/3/4/6/134681858/xomewujosel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487935/normal_5fe858b23659b.pdfIn PDF document text
    • http://gelchlen.fun/the_odyssey_emily_wilsonfa1i3.pdfIn PDF document text
    • https://romenugerod.weebly.com/uploads/1/3/5/3/135317494/5008201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_602c5a543a21d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448332/normal_600c877cdac75.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/wovitiku/dehydration_synthesis_and_hydrolysis_problem_set_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/96496389510.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/virtus_cants_form.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/sukuzasibivadawo.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/86126746046.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/70807759201.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/bts_album_love_yourself_answer_s.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_off0000dc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC72 5064 bytes
SHA-256: 128fc58de7ddddc1572be05e5afaa9d11ac23a17f666045f0859236de2d0c56e
font_01_sfnt_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 10488 bytes
SHA-256: 0d569b9bca7a389ec02b3f6a59098b5ad99817912573a493d5cdce2bac6568b7