Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d427b916707fe6…

MALICIOUS

PDF

73.6 KB Created: 2021-03-21 06:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ee593210cf8ffc31a54a58263d0bb019 SHA-1: afa163119505cec015684824248354974b8827eb SHA-256: e8d427b916707fe6c6893ac941f3b21cc70cd997654bce17168136fa770a82ab
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and heuristics indicate it contains a redirector link disguised as a free download lure. The embedded URL points to 'bologen.ru', which is likely part of a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/strik?utm_term=fry%2527s+first+100+common+words PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383452/normal_5fdeb2f25d843.pdfIn PDF document text
    • http://hookup673.site/starbucks_beverages_sizesob7wr.pdfIn PDF document text
    • http://babixorotewa.22web.org/nutrition_books.pdfIn PDF document text
    • http://airned.ru/9919075567771jnr.pdfIn PDF document text
    • http://nizulekun.iblogger.org/45-70_ammo_fallout_4_console_commands.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_601bacb2eeee7.pdfIn PDF document text
    • http://tehnopolis.org/how_to_scan_multiple_pages_into_one_document_canon_mp28044gxm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470689/normal_603ed082ab094.pdfIn PDF document text
    • http://rovepofaji.22web.org/97403835303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383680/normal_5ff265773b296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415767/normal_6035a5e8c32cb.pdfIn PDF document text
    • http://salonhq.xyz/nurse_drug_guidemyw1x.pdfIn PDF document text
    • http://chtotakoeverti.biz/finite_element_method_matlab_codeuim2y.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/wizedumi/telling_time_worksheets_2nd_grade_common_core.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/what_would_you_put_in_your_time_capsule.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/langston_hughes_facts_about_him.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/91935801536.pdfIn PDF document text
    • http://wawutanow.epizy.com/blank_bingo_printable.pdfIn PDF document text
    • http://sobuzazan.rf.gd/worksheets_on_collective_nouns_for_grade_4.pdfIn PDF document text
    • http://wifeloli.epizy.com/vowajoxaluzu.pdfIn PDF document text
    • http://tamazodatitemi.epizy.com/new_ielts_reading_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/woturumezagoxaterurevexuv.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/35387372085.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/whistler_village_restaurant_guide.pdfIn PDF document text
    • http://jonivobo.rf.gd/nimafizerusudabipoviva.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_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 5300 bytes
SHA-256: 1688fb744f2b165675f078778987c43c84ad78a5341100b01d3119045646ed72
font_01_sfnt_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 10632 bytes
SHA-256: 7ae157d415706736b73ac021c091a2aff63ebf352310ddee678f8d9de6cf9437

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