Malicious PDF — malware analysis report

Static analysis result for SHA-256 405bee2d35b8598b…

MALICIOUS

PDF

69.4 KB Created: 2021-02-24 00:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a70ddab02e6574efff78a2b138cb2f87 SHA-1: 28413e0f0df2c3dd7ffd3deb797f292a4f521938 SHA-256: 405bee2d35b8598b0bc5477214700e1c4e0d3207a9be4a24a5b31b63b2529c50
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://bologen.ru/wix?keyword=mythbusters+the+scientific+method+in+action+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500692/normal_5fdae3a116c84.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/13bfddcb9530e40.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/vipojefeguki-xupimugetajawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483071/normal_602ca5f779720.pdfIn PDF document text
    • http://cooldomen.space/bezebugufakazageginuxid3c9k.pdfIn PDF document text
    • http://atomyimperial.ru/free_pronoun_worksheets_for_4th_grade85v1t.pdfIn PDF document text
    • https://rawiranuxox.weebly.com/uploads/1/3/4/6/134618620/vobiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374688/normal_602f62ebc17c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448984/normal_5fc5d1785f9d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448992/normal_5fcf181f077ad.pdfIn PDF document text
    • http://world-wild-shop.com/trafego_pago_instagram_o_querpvma.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/pewibim/jepebajogixezuzatap.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/42544208231.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/contrato_de_arrendamiento_de_casa_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/transfer_of_training_bondarchuk.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_off0000d2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A1 5632 bytes
SHA-256: df878495d7a3990432e4dc8b3ccdf78e2e61ccd0ab54ccae73d9e8602afbdf78
font_01_sfnt_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 10168 bytes
SHA-256: fc2ac35b5b9375a3ec2dcc640217ba7a61bea71936d699083ae796f8c6c52f97