Malicious PDF — malware analysis report

Static analysis result for SHA-256 752a140a449d7bbd…

MALICIOUS

PDF

67.3 KB Created: 2021-02-21 04:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c74d5c9726ca2ba2ac85243c92656e94 SHA-1: b55b81f69a3ee7d0954ec6662a00cfa739d5a3f3 SHA-256: 752a140a449d7bbdf337add132f251c0fba05d3119b8ee01e4b3d684b9b03487
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=pokemon+heart+gold+soul+silver+guide+book In PDF document text
    • http://wepirafigezatid.22web.org/reros.pdfIn PDF document text
    • https://cdn.sqhk.co/zufosupiz/3icI9he/16636325770.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/gghhcuB/37644829136.pdfIn PDF document text
    • https://cdn.sqhk.co/zaliroded/hg4Mugg/power_warriors_9._0_download_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/5thh4W0/blazing_star_plant_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/NigSjeS/find_objects_in_schema_sql_server.pdfIn PDF document text
    • https://wefikugozakilo.weebly.com/uploads/1/3/1/0/131069992/pinigazilogadep.pdfIn PDF document text
    • https://zelosadu.weebly.com/uploads/1/3/1/3/131379518/kudurut_rarikuj_gasopel_guzijaramojas.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/Jhjhjgj/modified_likert_scale_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/igpyjem/91981385907.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zewedazogiwake.rf.gd/62003351509.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/gowodafixetimox.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/sewewene.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/98077548442.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/70544130545.pdfIn PDF document text
    • http://fizuxobitunoge.epizy.com/2289180510.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_off0000c90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90F 5504 bytes
SHA-256: 315baeb50dc6182d19de3d5f1438c3c288065be1879abbaf32bc11cb0ee11541
font_01_sfnt_off0000dba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 10644 bytes
SHA-256: 8671bee4ca9b16990ec893e6bec2854366171f1bc5563a8b4feb4a21e6f5d7ce

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