Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e628c1ecdfe6494…

MALICIOUS

PDF

70.8 KB Created: 2021-01-21 11:10:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 940b0218449db66437c4be351d46a3c2 SHA-1: 0251e0013b8e6186b5283db64509bc6b54767dee SHA-256: 6e628c1ecdfe64944d28d0fc758dcb12a3134a02cbb6671fa637af213cd84c61
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=suspension+file+tab+inserts+template PDF link annotation
    • https://cdn.sqhk.co/tewokozogop/kgdjhgd/dazuduvovobuze.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/fiiEUG6/vikux.pdfIn PDF document text
    • https://cdn.sqhk.co/lawikuto/jeIjbI4/suppository_for_babies_6_month_old.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5fa85ff99846d.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/iaQUljb/wallpapers_for_iphone_11_4k.pdfIn PDF document text
    • https://dejutuzalusabi.weebly.com/uploads/1/3/4/8/134869317/zakuxeveb_tobudalama.pdfIn PDF document text
    • https://faneboluti.weebly.com/uploads/1/3/4/4/134464249/guwomegok_tomewubowopul_bivabironate_fikom.pdfIn PDF document text
    • https://lidafeli.weebly.com/uploads/1/3/4/6/134683499/6657132.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/iajdhjU/human_life_expectancy_in_america.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/purufiz/jallad_emiway_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/perforated_plastic_sheet_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/bootstrap_3_responsive_grid_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/zaxawemi.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/vowitef.pdfIn PDF document text
    • http://gorevifero.epizy.com/annual_percentage_yield_worksheet.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_off0000d7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EB 5292 bytes
SHA-256: 39a85183552dc8a154cb278c07d606495cc0dc4b1cf5a6b481c0bb08b89698f5
font_01_sfnt_off0000e9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D0 10796 bytes
SHA-256: 08b49ae1e413c58f29a136a5bb61fb1032f6b71321e8f0b39e87500b527ca15d