Malicious PDF — malware analysis report

Static analysis result for SHA-256 666189c72f41eb63…

MALICIOUS

PDF

72.7 KB Created: 2021-02-18 09:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: dd5c8609f881288f7812d534bd0d9686 SHA-1: 52bf5cc06e772446802503ceebfcd6ace068903d SHA-256: 666189c72f41eb63e789bdd16429cfe7af7b9dfd9a6781b88bbf7e014cf7778b
196 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
  • 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://leonvi.ru/123?utm_term=is+there+a+new+harry+potter+movie+2020 PDF link annotation
    • http://naturapple.space/281176119997y96r.pdfIn PDF document text
    • http://korsabarca.com/67035270466jgf85.pdfIn PDF document text
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/0123f0f034.pdfIn PDF document text
    • http://becloud.website/how_to_success_in_network_marketing_in_hindil1x84.pdfIn PDF document text
    • http://scoretdho.best/4136733571mux9b.pdfIn PDF document text
    • https://wisokovunali.weebly.com/uploads/1/3/6/0/136051549/suvobi.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/nejulosokezozur.pdfIn PDF document text
    • http://jasapremium.xyz/purple_hearts_emoji_meaningjntx5.pdfIn PDF document text
    • https://vudefuzafovafid.weebly.com/uploads/1/3/4/6/134630521/zakuvojajuvofoxa.pdfIn PDF document text
    • http://jushq.pro/did_animal_from_the_road_warriors_dief44h3.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/lotibabakuj/arturia_beatstep_pro_manuale_ita.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/qmp_board_results.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/college_algebra_problems_with_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/mufenazefusex.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/20725841531.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_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 5492 bytes
SHA-256: 249a8db5f712951b612426fb1cc4bbc972116f20763024b372640ceee8a8c7c9
font_01_sfnt_off0000f248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 10380 bytes
SHA-256: b3710568e815fbb8c148f78d9ec5047e311988f266168670c48d8cf4c81bddcb