Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8991a5301e29f3…

MALICIOUS

PDF

68.4 KB Created: 2021-03-02 23:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2ead18afb966267a12d9630e85b440dd SHA-1: 893579848a11c222a2e8c433a5b8c99f77f9dd83 SHA-256: 1d8991a5301e29f31ca71f1e06cd26a852719b8afa128e017206405d1b9a36bf
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=how+to+clean+shark+cordless+pet+perfect PDF link annotation
    • https://kogafisefog.weebly.com/uploads/1/3/1/4/131438876/webuxedepexivufex.pdfIn PDF document text
    • https://wumigativagulam.weebly.com/uploads/1/3/1/6/131637174/surasixotupuv.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/lilozavuk.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/which_cuisinart_air_fryer_is_the_best.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/suzuki_quadrunner_250_service_manual_download.pdfIn PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/luzipose-lalololub.pdfIn PDF document text
    • https://mumovukejepi.weebly.com/uploads/1/3/1/4/131483147/5947078.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/tasufagijaremo/76912805201.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/30328358988.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/what_can_i_feed_my_daphnia.pdfIn PDF document text
    • http://disoluje.myartsonline.com/26321758379.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/beats_solo_3_wireless_how_to_work.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/tuvosirebeludetukajumuf.pdfIn PDF document text
    • http://jogisav.epizy.com/memodivan.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_off0000cef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 5360 bytes
SHA-256: f9540e33b80db00f744bd891811bb9bed41c3591434f8c9cd058d22fdb516e0d
font_01_sfnt_off0000e136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE136 10492 bytes
SHA-256: 8c2b8627b4ddab0230ef1fd157a64ae0e3c7df333aca02454b7354baabfdd787