Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ccab8fd9868497…

MALICIOUS

PDF

72.3 KB Created: 2021-02-26 07:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 8c1a61f03549c9cf96c41b5948a9caf0 SHA-1: d041d979a6abb67bcd38f3d6aa2765b62a0be362 SHA-256: 59ccab8fd9868497c915d4e474e06d4ee507fe1696a0e6f8dc3e9c59c3daa526
196 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
  • 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://maypoin.ru/award?keyword=why+shortcut+keys+not+working+in+excel PDF link annotation
    • https://cdn.sqhk.co/pugusomimoro/tOjjgcq/fancy_fruit_cutting_tools.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/ijgcghn/doruronadamiwefajugoka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_5fe815ffb2621.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/4934542.pdfIn PDF document text
    • http://momarivido.mypressonline.com/john_deere_110_backhoe_for_sale_canada.pdfIn PDF document text
    • https://xesuxikoju.weebly.com/uploads/1/3/4/0/134095833/781dde9ec93dc.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/j1SAAHF/95046610192.pdfIn PDF document text
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/5420624.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/jeasuLG/73566115132.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/bebod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489257/normal_5fd8e522f2f0d.pdfIn PDF document text
    • https://cdn.sqhk.co/wevosevob/ICLicKP/motorbike_driving_simulator_3d_apk.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/rupatojuko/ginenapesuro.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/income_tax_return_form_business_profession.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/clarinet_sheet_music_pop_songs_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/best_free_antivirus_software_for_android_tablets.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/basic_html_template_for_website.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/nefugomeweradebalujiguni.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/vumuzupilunimenibuzupu.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_off0000ddb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB3 5192 bytes
SHA-256: 0289fc59370ad60e720ae1f053a00db2aee4f3bf9763b02c986edf8ae504b592
font_01_sfnt_off0000ef83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF83 10736 bytes
SHA-256: b8a8868d223b573ed9352d97fbee4382ef448b258d32b9564c8b38c94e0198e0

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