Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c01523ebc614de…

MALICIOUS

PDF

76.2 KB Created: 2021-03-30 06:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b03483304695b54648a2c91ac3c14f5f SHA-1: c503f7b983d176852697e0b6ac9267f9470a1aca SHA-256: e8c01523ebc614de7886ecfd327a13d97f81a7f0a06baf0f9e9df4a66a0584ae
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to a URL. The embedded URL `https://botokaw.ru/123?utm_term=gothic+word+search+answers` is identified as a redirector for phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://botokaw.ru/123?utm_term=gothic+word+search+answers PDF link annotation
    • http://cadenalia.com/cirque_du_freak_the_vampires_assistant_full_movie_in_tamil_downloadjmtpo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5fcf50cfe0270.pdfIn PDF document text
    • http://ribupisid.22web.org/oxford_dictionary_synonyms_and_antonyms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427529/normal_5fcd07b230766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_6036c560e102a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_60555ce0667bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484359/normal_6052e4f49fa37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_6032f83a170c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446511/normal_605ba21fd4c1e.pdfIn PDF document text
    • http://promoocaoameericanas.com/ruwisaravugemixemuny5na.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gigixago.epizy.com/wudorabuvovewafoku.pdfIn PDF document text
    • http://nafabumawo.rf.gd/ferrari_california_for_sale_under_100k.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/tubebamigiwemujamugetov.pdfIn PDF document text
    • http://fafezevasuba.rf.gd/negative_effects_of_migration.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/always_stay_humble_and_kind_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/integral_calculus_feliciano_and_uy.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/fizutopi.pdfIn PDF document text
    • http://xetorofowuwid.epizy.com/6229260714.pdfIn PDF document text
    • http://tilebimelexin.epizy.com/descriptive_writing_prompts_with_pictures.pdfIn PDF document text
    • http://zovebosovu.rf.gd/binomische_formeln_aufgaben_lsungen_klasse_8.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/timavukekigopixud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF7 4904 bytes
SHA-256: e3706e6cd0a19ff72dc608a527e3e708c5119e08782df9d3c59de6fa80ef3bfc
font_01_sfnt_off0000f0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 10856 bytes
SHA-256: a27469585f04bb4074a53123e69786c49ac0200c3c81966efadbf464a94466d7
font_02_sfnt_off00011590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11590 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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