Malicious PDF — malware analysis report

Static analysis result for SHA-256 d998db8f30727cfb…

MALICIOUS

PDF

72.4 KB Created: 2021-02-27 07:15:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 049e62c1d2d22f9cb111505360f6d640 SHA-1: 94413adc4141cdcb58b04ad96dd0a6163ee770d6 SHA-256: d998db8f30727cfbc5bff17ee7892a2547de52f0884cf48944560d46a537bee2
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://gimoguvi.ru/award?keyword=images+of+organizational+charts PDF link annotation
    • http://wwbook.org/what_does_a_grant_of_letters_of_administration_look_liked6s59.pdfIn PDF document text
    • http://detonicro.website/mobogenie_for_android_6._0_freexi77r.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/foOiSGH/livak.pdfIn PDF document text
    • https://cdn.sqhk.co/dikapagoloza/i7J0ig8/lugerevutoreb.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/bCiacsa/hume_bank_login.pdfIn PDF document text
    • https://gazewowotom.weebly.com/uploads/1/3/4/6/134616189/zugis.pdfIn PDF document text
    • http://lg-supportteam.com/43540378324ru07q.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/bgcuhiV/crossfire_series_books_in_order.pdfIn PDF document text
    • http://xteenware.online/public_affairs_graduate_jobs_londoniuilo.pdfIn PDF document text
    • http://arendaavto.taxi/steelseries_stratus_xl_not_pairingszblb.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/genijusemu/college_essay_format_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/13719107522.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/41075023707.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/aws_s3_bucket_name_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/vabesisufoxefura.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/80474607211.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/roblox_shirt_template_galaxy.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_off0000e00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00A 5284 bytes
SHA-256: b47ac2d6de44aac709cffa5e3b4f6b0197c44b556b3662d652294ba7c20510db
font_01_sfnt_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 10284 bytes
SHA-256: 2518607d7fed742d54750dc4e2af5678e389d6ef9720aa8f56bcd78658d05d9c