Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb1b253b22eb617…

MALICIOUS

PDF

70.4 KB Created: 2020-11-11 07:18:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f5a725f208d50a8def1f4565a97488ef SHA-1: cc8d703ef1a9472e6d9b4273c98da9e089ccb5b3 SHA-256: fcb1b253b22eb617c42d9647b7e8d445253938bf8960d6499e642ef3b1344b98
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://trafficel.ru/123?keyword=spanish+to+english+google+translate+gasa PDF link annotation
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/nagadajoro-fotibijujuwo-xawanumiwixadeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5fa88fc077bf2.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/voxafuvezo-rubozopuposazog-pimitepe.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/nevuwabemovudifiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457272/normal_5fa7631be3d9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_5f9d00afb93fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5f973796b085c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389804/normal_5fa0452f28ae7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/225f3065-be0c-433f-bf1c-aa733b501e06/les_diffrents_complments_circonstanciels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a0b240-d3cb-4c94-914a-157cdf8456d1/69397326191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9172a54-11ae-4a44-876d-6266c343e80d/yogbox_mod_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a71e316-6d74-40f7-bbe1-e450d40a22dc/26821726743.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/veben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07628cab-ca7d-4ec2-ab32-c84b351b3428/rakitarunaxipuboti.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_off0000d649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD649 5184 bytes
SHA-256: ca4a7438a03f60e194c5cb76de99867a88648330bfe001774b143a5771b911d8
font_01_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 10956 bytes
SHA-256: 87fa5a0ee4d91af3d7c482189609cd1516863b7144568658bd6dba22f3f8f84b

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