Malicious PDF — malware analysis report

Static analysis result for SHA-256 e808b79e8aa44783…

MALICIOUS

PDF

78.5 KB Created: 2021-03-15 02:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b19cfe0211ff775771e47b11f757f192 SHA-1: 346658bdd27f94f3704a616313954a85ff85e568 SHA-256: e808b79e8aa44783090b7d3e30ce2d4c5921b2620049300fe47a432113685b7a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/strik?utm_term=what+is+naviance+in+english PDF link annotation
    • http://centerverifybadge.com/zotosapirotohh5t6.pdfIn PDF document text
    • http://copyrights-notices-helps.com/lindor_truffle_colors_guideb96n3.pdfIn PDF document text
    • http://termo-nord.tech/gepitzhw6n.pdfIn PDF document text
    • http://yesnutural.space/quadratic_equations_and_inequalitiesjf2fv.pdfIn PDF document text
    • http://itactical.xyz/retro_pac_runner_the_labyrinth_game_downloadwh1u7.pdfIn PDF document text
    • http://imedo.ru/lufutumusovosabedajeksbfl.pdfIn PDF document text
    • http://italy-small.space/mailchimp_audience_reportsdla2a.pdfIn PDF document text
    • http://astrology-personal.online/gitofukopofuvubujoec12z.pdfIn PDF document text
    • http://helpforteam.com/que_es_el_lenguaje_corporal_segun_autoresb239g.pdfIn PDF document text
    • http://handler-autoscout24.com/dark_empiret0pfw.pdfIn PDF document text
    • http://rusherx.studio/last.fm_scrobbler_not_working7omxv.pdfIn PDF document text
    • http://haifaiv.ru/the_mystery_of_the_shemitah_free_download7cma0.pdfIn PDF document text
    • http://item-get.top/fedex_ground_clarksburg_wvfqb32.pdfIn PDF document text
    • http://golomashvanna.xyz/fivutorexuzojukowupoxefdr1lt.pdfIn PDF document text
    • http://viewcreditscore.info/82085489130ybowl.pdfIn PDF document text
    • http://bilkan.fun/is_it_healthy_to_eat_banana_and_milk_together0skxq.pdfIn PDF document text
    • http://obschee.xyz/19541131224acsje.pdfIn PDF document text
    • http://interplast.ru/galijosudevovetimpkovc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6c68f6b-ea27-496d-887a-e107507ce2cc/lord_of_the_flies_chapter_12_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/552be395-629c-4350-8f68-fee2df7c886a/2007_honda_civic_hybrid_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f68f1b07-4bb8-424c-b135-a625a310397f/how_are_books_and_movies_alike.pdfIn PDF document text
    • http://www.naviance.com/In 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 5036 bytes
SHA-256: 766187332cb785c61d390067e55900e1aa1bf335ebe54717272c31f7f568ddb6
font_01_sfnt_off000107f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 10744 bytes
SHA-256: fa64be4b70211014b6ef4eef572d09c996afacc2e1b221e54929ebdb360fa333

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