Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ff9d7d9adecf40…

MALICIOUS

PDF

69.6 KB Created: 2021-03-02 02:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d852032a8a34ee56129ef726d99a7a70 SHA-1: d7c7cb3b0bcd029386dad8f023ebc440fed2068f SHA-256: c5ff9d7d9adecf40d813af427a2a448c0580bd878170f2cbfcc9715e2851c3e5
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=doubles+and+near+doubles+worksheet PDF link annotation
    • http://esmoney.site/bosozet1zo2.pdfIn PDF document text
    • http://frontend-developer-azaynullin.site/843189002975sv6e.pdfIn PDF document text
    • https://zoxusikajikad.weebly.com/uploads/1/3/4/8/134851315/xisizepilemagefuredi.pdfIn PDF document text
    • http://xviiivbgz.com/how_to_read_wais-iv_scoresfhs4w.pdfIn PDF document text
    • https://zipadufemawosep.weebly.com/uploads/1/3/1/3/131398243/jebekevudifaba.pdfIn PDF document text
    • https://mutebomex.weebly.com/uploads/1/3/2/7/132740724/gudivitotun_kegibavupufi_zijupilexido.pdfIn PDF document text
    • http://fredo.run/mac_android_emulator_bluetoothxpacc.pdfIn PDF document text
    • http://salea.site/vabinukr99de.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/gafipip-mavavo.pdfIn PDF document text
    • https://kutawujotin.weebly.com/uploads/1/3/4/0/134016956/21f943ad679.pdfIn PDF document text
    • https://jikumuwalomaj.weebly.com/uploads/1/3/1/3/131383204/mexewenimakug.pdfIn PDF document text
    • https://jukamonasob.weebly.com/uploads/1/3/0/7/130740128/tiwuzamobimime_zowigivataj_fuzafijif.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/67f5a72221.pdfIn PDF document text
    • https://piwevowukitibe.weebly.com/uploads/1/3/1/4/131454699/memugozapemugas.pdfIn PDF document text
    • https://revawovaweku.weebly.com/uploads/1/3/4/0/134013066/2068e02ea.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/d66e09f9.pdfIn PDF document text
    • http://ijmalan.xyz/molinonedunamupmqoli.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/kizugokofo/assassin_s_creed_odyssey_fate_of_atlantis.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/xisiwejozej.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/frayer_model_diagram_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/71560541342.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/tolele.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_off0000d521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD521 5208 bytes
SHA-256: 9f8533eb181a828d821011991ee77e3e3db3c41123fded98dd23c977be649314
font_01_sfnt_off0000e6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DF 10048 bytes
SHA-256: f648116c6423c8b33b6cb0e4906b927e696356c97306ff9b9487729629fe5738