Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f90f3b255dd1ab1…

MALICIOUS

PDF

70.6 KB Created: 2021-02-23 00:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f87895bc497113409c50702bbecb70b4 SHA-1: a0811661e08d6110014a26836f6e1daf792f9716 SHA-256: 8f90f3b255dd1ab12b359e93dc7dfe8912cf5b30f1c5bd444155e109cd71915d
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=american+government+stories+of+a+nation+2nd+edition+pdf+free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4391915/normal_5fed029486103.pdfIn PDF document text
    • http://czecheducation.space/teaching_young_language_learners_pinterwq2ax.pdfIn PDF document text
    • http://pannochki-art.com/lapevamasexevofinudixekv5iy.pdfIn PDF document text
    • http://job-finder.space/zovifexaditibovax1vue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_602805e96e394.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/sTsZgdR/lightroom_free_presets_mobile.pdfIn PDF document text
    • http://scandisvet.ru/book_review_of_novel_lord_of_the_fliesauiqs.pdfIn PDF document text
    • http://potenciy.xyz/86764185041dkqr7.pdfIn PDF document text
    • http://sis-paypal.com/singapore_stock_market_analysis_reportsd3jo.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/h7MZ0je/kerusojom.pdfIn PDF document text
    • http://itverys.space/69319893346snixh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393641/normal_5fca6dbfa1c9d.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/zabevog/spotify_songs_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/bepinevugep.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/punctuation_worksheet_for_grade_7_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/solving_equations_worksheet_variables_on_both_sides.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/14685855843.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/apa_style_format_book_reference.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_off0000d518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD518 5624 bytes
SHA-256: 3104e2bdb88e79b609eec6a342e68082592ade356eaafdca2d4d945c6145d30c
font_01_sfnt_off0000e82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 10800 bytes
SHA-256: 1a91e2bca8300702c6e4594c279de76fa6589a336a1f17892487b3baaccb2b0a

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