Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fb587a1499de98…

MALICIOUS

PDF

71.2 KB Created: 2021-02-15 22:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 72aa063863bd21f54887a965ffbca234 SHA-1: c1aa8bc25914e5955ad2d888df6ecbec04755b11 SHA-256: 96fb587a1499de98fb33f5779e0a9f300fd891e56a33daac84d200c0fec54ad5
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=blank+study+guide+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5fd8966f808d0.pdfIn PDF document text
    • https://dolivosogokate.weebly.com/uploads/1/3/0/8/130874088/mafamipaxibezib.pdfIn PDF document text
    • https://pakakisokuz.weebly.com/uploads/1/3/1/3/131381756/5501739.pdfIn PDF document text
    • https://kotasixunepa.weebly.com/uploads/1/3/0/7/130776076/1325556.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/vid7Rii/1639251579.pdfIn PDF document text
    • https://lexezidelaxo.weebly.com/uploads/1/3/4/6/134605078/zekiruxeper.pdfIn PDF document text
    • https://nesibebinirudeb.weebly.com/uploads/1/3/5/3/135311353/072f0269b43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_602217860629e.pdfIn PDF document text
    • http://sevelorovuwo.66ghz.com/aspen_enteral_and_parenteral_nutrition_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/asirytI/plumber_install_water_pipe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_60289cc3f0f37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485436/normal_5ff78e96c114d.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/bufipevuril/best_punjabi_movies_site_for_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/salary_appraisal_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/jozenefobo.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/jingle_bells_sheet_music.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_off0000d098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD098 2892 bytes
SHA-256: b2f6842ece3a16682cb3359d21449b6e1870e9274665864897ff9a59440bcde9
font_01_sfnt_off0000daef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEF 5396 bytes
SHA-256: db8e78fb6d4c64c796ca3284c5e2bdbf71003bfb11eb9fb398a2475d4f98b1dd
font_02_sfnt_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 10128 bytes
SHA-256: f09f5297d5092635d83f50b4253f76b6bad5a977ef58fceafff2c1989cb0aa92

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