Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5abbd62dd8dd97…

MALICIOUS

PDF

68.3 KB Created: 2021-02-22 11:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eaa2cdde7c5f1712dc59a36f0e6433de SHA-1: 2752b8e21f398744851a0ec7fd7cbb30d63bc022 SHA-256: 3a5abbd62dd8dd97136c05412c0418b6a66e58574fcc516438e9e93d83416a91
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=geometry+worksheet+congruent+triangles+%25233+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413362/normal_5fde818819959.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/jiji_kiki_s_delivery_service_cosplayh3wkh.pdfIn PDF document text
    • http://blacklaser.ru/fojugf3xvo.pdfIn PDF document text
    • http://center-san.ru/zetikawulewafuxibasijisflzy9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464852/normal_5fce07270e16c.pdfIn PDF document text
    • https://genoduvule.weebly.com/uploads/1/3/1/4/131407197/9601319.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450907/normal_5fcb3ffa28c74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5fce52690d6fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5fcdb4197a30f.pdfIn PDF document text
    • http://supermagazforsale1.xyz/how_to_turn_on_kitchenaid_gas_stovecpjl2.pdfIn PDF document text
    • http://libralab.digital/download_foxit_advanced_editor_portablez2v6i.pdfIn PDF document text
    • https://lixezakokigek.weebly.com/uploads/1/3/4/5/134596317/6a8ed7b02c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepavipa.epizy.com/57336366502.pdfIn PDF document text
    • http://xugidujesu.epizy.com/28568906205.pdfIn PDF document text
    • http://nivovagemesow.rf.gd/54601864307.pdfIn PDF document text
    • http://jominata.rf.gd/free_ds_emulator_for_android_apk.pdfIn PDF document text
    • http://tegazadolital.rf.gd/vijibalajisozexewe.pdfIn PDF document text
    • http://ronogaso.rf.gd/browser_history_android_tablet.pdfIn PDF document text
    • http://tofezaniv.rf.gd/aplikasi_format_factory._exe.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_off0000cd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD78 5500 bytes
SHA-256: 4b3ebf7c5d824e36cbeafdccd36ede02b522b63d3c3aa1a43824a85757e94af4
font_01_sfnt_off0000e023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE023 10552 bytes
SHA-256: de888f97438e6e3e4a91fdfea36cdf027b13294b72612217dc65d274411ef37b