Malicious PDF — malware analysis report

Static analysis result for SHA-256 76c210b87ab3629b…

MALICIOUS

PDF

84.7 KB Created: 2021-02-11 12:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 536377507f90355eda1f600464337c7e SHA-1: dcdc71ddb71dff8cf4e420fb1d30ed240d1f65c7 SHA-256: 76c210b87ab3629b03d9c07367d274ba765764090aaeae4db2a892cea2962258
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://leonvi.ru/123?utm_term=the+dead+and+the+gone+audiobook+free PDF link annotation
    • http://pollsexpert.com/ccna_v6_packet_tracer_answers7ezot.pdfIn PDF document text
    • http://naturalik.fun/mens_longer_hairstyles_20196xnm0.pdfIn PDF document text
    • http://futup.ru/tasugon0uxmz.pdfIn PDF document text
    • http://pelistens.xyz/55784223380utwxq.pdfIn PDF document text
    • http://bostpolamos.site/mumifuwombzxg8.pdfIn PDF document text
    • http://2020coupons.info/kubuzovokanojalidum1ccpu.pdfIn PDF document text
    • http://parrrtner.xyz/lawopepewaxuvanawipinomzi.pdfIn PDF document text
    • http://drive4mclaneaustell.com/blue_garden_spheres_ballsxc7oa.pdfIn PDF document text
    • http://gtomishebs.xyz/wojerazazu5oy8.pdfIn PDF document text
    • https://roralolew.weebly.com/uploads/1/3/0/7/130775143/nuvemi.pdfIn PDF document text
    • http://legko.travel/xelonim3hc.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/viregujipowuru/69761712247.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/nozofimasorifitamumibiweb.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/dolovo.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/35608861730.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_off00010c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4F 5112 bytes
SHA-256: ff5cf6b354f61df7c671c8b04e7d588c3784e1712a0f3aa8f1314a14ed0dc01f
font_01_sfnt_off00011db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB6 11264 bytes
SHA-256: 8123b54bcf277299d052bd8a98dfc9ad41576fa4e13a09f580d13daeb6145f0f