Malicious PDF — malware analysis report

Static analysis result for SHA-256 5885cd1ba0edc6f8…

MALICIOUS

PDF

84.9 KB Created: 2021-03-13 16:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: daff62cfa82ee151ef9d609891160eb1 SHA-1: 321186683862b78ede1605fe5ec64fc895622858 SHA-256: 5885cd1ba0edc6f8485a7f19940d39f188a1bbc6c7e82fedd197ce812e33581f
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://midufefew.ru/award?keyword=alimentos+para+diabeticos+pdf PDF link annotation
    • http://zerudomafiko.iblogger.org/jafovubalusu.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/o_reilly_safari_download.pdfIn PDF document text
    • http://kijodebida.22web.org/58847909798.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/c026bd68-a231-4893-b876-45406fead13e/sawolupikugatuborabob.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/vinyl_sheet_flooring_melbourne.pdfIn PDF document text
    • http://vonezilomobupir.rf.gd/85291376586.pdfIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_084d6b8275bd4df790420d5b5baeefe0.pdf?index=trueIn PDF document text
    • http://tozibuxadotoba.epizy.com/71951096014.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/teddy_fitted_sheet_small_double.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/4628872242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/620fd4b3-9dc6-48c5-abf0-84e3bacb71fb/difidululidufeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce3c1514-3a81-430c-b91a-cbc7ef0e34fb/what_is_the_last_book_of_the_selection_series.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/biroxek.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_249954af03e644bd97e556978a6267a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e78c042-8a88-4421-8457-5b111e295145/lomoxorubixerikowi.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/70248281232.pdfIn PDF document text
    • http://ligafima.rf.gd/guwaxosikenobexoboma.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/39250871515.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
    • https://medlineplus.gov/spanish/diabeticdiet.htmlIn 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_off00010a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A03 5432 bytes
SHA-256: 47880c17b87c7d09f2914e39d3eee99c6b386a5c30e854a13335ec7c736afefe
font_01_sfnt_off00011c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5E 12348 bytes
SHA-256: 4efe0bd99d81bdc8ada8c7686ce35087f758ebaf80f6c04468360da9a56d2918

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