Malicious PDF — malware analysis report

Static analysis result for SHA-256 c386370b773e8c99…

MALICIOUS

PDF

67.5 KB Created: 2021-02-18 06:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ef489cb3129e2200b4de2313c3799a97 SHA-1: ecb9a44cc682755201f842880cb19c01fc70481a SHA-256: c386370b773e8c997624386c01c79414ca48c5ede84a31fd8aa85614be4478b7
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://crophysi.ru/wix?keyword=my+guitar+shop+sql+answers+chapter+3 In PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/cThaBfJ/26338289894.pdfIn PDF document text
    • https://cdn.sqhk.co/gekakisoduvo/hjYijja/best_80s_new_wave_music_playlist.pdfIn PDF document text
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/38fddfe9.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/Ggciaja/zurijimesurajoxafa.pdfIn PDF document text
    • https://disemiseses.weebly.com/uploads/1/3/1/4/131407045/6279236.pdfIn PDF document text
    • https://pimakiwukusa.weebly.com/uploads/1/3/4/7/134712386/8ea18ee4d16126f.pdfIn PDF document text
    • https://devudupaf.weebly.com/uploads/1/3/4/8/134880603/ee98f185e06544e.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/7797828.pdfIn PDF document text
    • https://vaxurubezinijor.weebly.com/uploads/1/3/4/6/134690270/lefex.pdfIn PDF document text
    • http://freefire-gifts.com/comment_pouser_un_millionnaire_tome_1k6iuk.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/iajLykK/finawakudoti.pdfIn PDF document text
    • http://milanomoda.site/lethal_weapon_3_filming_locations4jk02.pdfIn PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/sedesigixiwab_zusasikopuzo_livone_gaxelovuded.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/kizadelulolujurijo.pdfIn PDF document text
    • https://wirevoge.weebly.com/uploads/1/3/1/8/131856771/lewifur-filakujajozosad-nivadinalipel-gupew.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/tupofelasujewas/mechanical_engineering_summer_internship_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/certificate_template_ms_word_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/nigovavajezan.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/23125166995.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/comics_books_in_english.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_off0000c981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC981 5684 bytes
SHA-256: 0620b702474f05f04399aea46de93320988eb5dfcdd8e622e4a6ab32c39cbc1a
font_01_sfnt_off0000dd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD05 10440 bytes
SHA-256: f3b86e53b3dcce8975cadc9abc45fe7cdba38d1c7dd7d3d8468d9c150f4121a7