Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e60b6b5c380071…

MALICIOUS

PDF

72.0 KB Created: 2021-02-01 10:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 822273dcc01fe71fdc7d28826f4a8cf8 SHA-1: d0df1462c820c3497633360a2743fcbbd71af9b2 SHA-256: d8e60b6b5c380071642c3fa6a1d0a81e83616c7f52b9d55e12fb80698b1a3f91
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/wb?keyword=visual%20voicemail%20by%20metropcs%20review In PDF document text
    • https://soliduratop.weebly.com/uploads/1/3/2/3/132303261/3729383.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/8058046.pdfIn PDF document text
    • http://hyipinvest.site/verb_conjugation_french_worksheetsx5l2h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_5fdd97f656111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454052/normal_5fce5a1b231e2.pdfIn PDF document text
    • https://nimifitirujaga.weebly.com/uploads/1/3/4/6/134693460/ce662910420c.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/lofixubodixup.pdfIn PDF document text
    • https://tenivutod.weebly.com/uploads/1/3/1/0/131070705/bunugujimifib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_5fe91bf5eaa08.pdfIn PDF document text
    • https://xuxukiworizep.weebly.com/uploads/1/3/4/7/134723333/be331.pdfIn PDF document text
    • http://instacopyrightcenter.com/minecraft_1.8_indir_team_extremef9kvb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468253/normal_6004fd5949b55.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/dazinibonofobi/set_default_template_powerpoint_365.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/duvab.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/2048255637.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/sbm_e_report_card_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/discovering_behavioral_neuroscience_edition_3rd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/second_grade_high_frequency_words_worksheets.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_off0000dac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC5 5436 bytes
SHA-256: 9920c95d02e7f4f0f4f7feeda52dab8b0c58713b0d1eb75be6f73a5e3f1aba55
font_01_sfnt_off0000ed44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 10992 bytes
SHA-256: e2d48c749b0e7bbc34f23ade25ad0fb35cc9ad91d0df61cfc0856ef4f6338679

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