Malicious PDF — malware analysis report

Static analysis result for SHA-256 79527cad52666f6c…

MALICIOUS

PDF

67.7 KB Created: 2021-02-13 10:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8f79875413786f667245285bd37c7437 SHA-1: 5eacef4a6287207bfc9962b1e4d5524770e4ce91 SHA-256: 79527cad52666f6c460bf4abd0b603575b416c0f7caaa29a6f4feec68e474e7c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/wix?keyword=betty+crocker+cake+mix+directions+on+box PDF link annotation
    • https://wikifezetusu.weebly.com/uploads/1/3/5/3/135306480/2951899.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/9115347.pdfIn PDF document text
    • https://laxepesijuniz.weebly.com/uploads/1/3/1/3/131383562/legirozituledu_mudijomasuniza.pdfIn PDF document text
    • https://cdn.sqhk.co/xezojutatow/gocsrij/beautiful_wallpapers_for_iphone_5.pdfIn PDF document text
    • https://cdn.sqhk.co/ximepadogi/jqjesih/pelanesaxaluzazebol.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/career_paths_law_teacher_s_bookqag5w.pdfIn PDF document text
    • https://cdn.sqhk.co/sajixobuko/4hi5eje/stickman_ninja_warriors_the_last_hope.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/xpWpPij/fumipululurufivipuxapetef.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/vifusupegiza/14807856819.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/64276243892.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/3492773173.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/tagelidanowepaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/android_ps_apk.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_off0000cc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC65 5476 bytes
SHA-256: 13442ca59e71990e5f3a9a43fe1b44f28244fb24b1859974b6fc8830220acc97
font_01_sfnt_off0000deff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFF 10320 bytes
SHA-256: 2507b7c2d7b716dfa965df1d48bb26ef19dff58cb01934687d5b1598ea4115f9