Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbacfe829f5ecc8…

MALICIOUS

PDF

75.0 KB Created: 2021-02-25 13:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 34b99f60ccc4ea55890de8a041412573 SHA-1: 715a00f8eec72e6160cba7bbde71500237b15a08 SHA-256: cdbacfe829f5ecc86c01a3b2f9aa480529a34734e76636ee5019335d817bbf48
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://jottigo.ru/wix?keyword=moorpark+high+school+track+and+field+schedule PDF link annotation
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/sotekin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404964/normal_5fc61ba476257.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fca6e7c6832f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_602ef4c700389.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/a29c189ea6e21ed.pdfIn PDF document text
    • https://serijarivak.weebly.com/uploads/1/3/0/7/130776739/jegazuwozafiwa-seteturexofod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451555/normal_5fc8b29946c8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492257/normal_600311da3d10f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449984/normal_5ff758bcdd24e.pdfIn PDF document text
    • https://wadazujirala.weebly.com/uploads/1/3/4/5/134596454/9086742.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/7699637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_603732386ac4e.pdfIn PDF document text
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/91529.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386829/normal_5fccb12651825.pdfIn PDF document text
    • http://sell-toclick.online/70309343980c18m2.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/onn_mini_bluetooth_speaker_instructions031fz.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/wozini-bosevidurin-ninawexotig-renobab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401989/normal_601b1bdd99044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93A 5484 bytes
SHA-256: 797b1ad237359c5e41dbda2473279aad59d080aa18b0e64b1704198414cf95d9
font_01_sfnt_off0000fbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEB 10324 bytes
SHA-256: b1b5d2875060dac86a7a300a158fd8f897704d05dfc8b2f5638ad3db68076e68