Malicious PDF — malware analysis report

Static analysis result for SHA-256 f816ee11c683b24d…

MALICIOUS

PDF

70.8 KB Created: 2021-03-03 18:32:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 40ce2a0bc2eb439e76aac82d28e50afb SHA-1: 522edbe075b61db4f91e49f3350f3fa5609237d5 SHA-256: f816ee11c683b24d7b670b424341813a2cf59ce202cd6473f2bf1cd776fdfd50
254 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
  • 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/wix?keyword=into+the+hollywood+groove+lyrics In PDF document text
    • http://lami-lashes.site/jd_edwards_9.2_training_manualybq9u.pdfIn PDF document text
    • http://desokore.medianewsonline.com/tatug.pdfIn PDF document text
    • https://banezinalirunod.weebly.com/uploads/1/3/1/4/131437453/1000407.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/the_angelus_prayer_in_latin.pdfIn PDF document text
    • http://reduslim-europa.site/sky_fighters_3d_hack_apk_free_downloadic5oy.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/crossword_puzzles_online_free_games.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/tobito/consumer_reports_best_washing_machine_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/medekavenukubu.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/vepilug.pdfIn PDF document text
    • http://poradenojipedu.rf.gd/oh_saki_saki_song_bestwap.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/honda_harmony_1011_deck_belt_size.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/40023210974.pdfIn PDF document text
    • http://fuzaxovojige.epizy.com/zezatozek.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_off0000d912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD912 5184 bytes
SHA-256: 8a03ab22f63a0dd599bbeb42754092a7e267794b4295989020b656069a30c051
font_01_sfnt_off0000eacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACF 10508 bytes
SHA-256: 92691a0d265f6a18bed5cfdfd6430f5367faa9fcb9589caa6411fbe24888b8c7