Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2644bf516863ac…

MALICIOUS

PDF

70.3 KB Created: 2021-02-17 21:24:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4f7a814260c0e8a32ddf4b0ff4c68352 SHA-1: a9d1cb934940823c7e300134628c448f238d4d6a SHA-256: 0a2644bf516863aca7c8a74b1d6280ee103bd1245b5710ca9feec1249ee95f6e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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=faceing+math+lesson+19+square+roots+answer+key In PDF document text
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5ff41fef16f3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392195/normal_5ff9c26ec24c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402940/normal_5fe07e81d1f98.pdfIn PDF document text
    • https://cdn.sqhk.co/gurudulep/hjukiaR/vodafone_yanimda_neden_bedava_internet_vermiyor.pdfIn PDF document text
    • https://cdn.sqhk.co/toridezoxiko/wihEbgg/happiness_lyrics_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494681/normal_600a3ce8a13a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_600b117a7a360.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/Ehbih6T/monkey_fight_game_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_602477463b5ef.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/jerigYj/90s_music_r_b_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390385/normal_5ffe97771f16a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413567/normal_5ff24e876fd3e.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/92B0yji/pikugikagovose.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/juzinaramip/lofepabov.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/rental_agreement_form_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/pimokeketuvipelamuviti.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/fukujugurij.pdfIn PDF document text
    • http://waxodomopupu.epizy.com/59491032457.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/annuity_factor_table.pdfIn PDF document text
    • https://www.youtube.com/watch?v=FmIhlc1bJuA&nohtml5=False---slopeIn 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
    • https://www.youtube.com/watch?v=FmIhlc1bJuA&nohtml5=False---slopeIn 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_off0000d3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C5 5760 bytes
SHA-256: 1ac8914d2bbf1530ad2133bf19189e443cb801f0364ac16a75d2f23fcdc43b5c
font_01_sfnt_off0000e758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 10696 bytes
SHA-256: 87d8b73971ed37743734ac51fc816aecd95324b83af3c5f7e305ecf7143a284d