Malicious PDF — malware analysis report

Static analysis result for SHA-256 5373febd1862d1b4…

MALICIOUS

PDF

72.9 KB Created: 2021-02-24 10:09:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3c1967590625c7e29c4a3609a16f1eec SHA-1: 0c34cbb496f0e7383b8ac9bc346f7d2e18db3a14 SHA-256: 5373febd1862d1b452cec9c0eaf01984703407710f5490dfb41ac8ff24d65f80
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=abriendo+paso+lectura+un+oso+y+un+amor+answers PDF link annotation
    • http://nufogikije.22web.org/spanish_learning_book_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407069/normal_60356cc22fa83.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/fimiwupigi_vopuguxiguv_bezexagase.pdfIn PDF document text
    • https://bexaxaxaf.weebly.com/uploads/1/3/2/6/132682125/41e7725ee087f49.pdfIn PDF document text
    • http://fb-pageunderreview.com/934605054782kggc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454171/normal_5fdfd94b560b0.pdfIn PDF document text
    • https://nasovakuj.weebly.com/uploads/1/3/2/3/132303133/8c95de6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5ffff370613d6.pdfIn PDF document text
    • http://dofoten.22web.org/what_vegetables_grow_well_in_central_florida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_5fe872af3b606.pdfIn PDF document text
    • https://rufukowov.weebly.com/uploads/1/3/4/6/134665675/pujigeko.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/vebogotexaf/73247477187.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/28271329767.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/voxolebapax.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/depoboxopatanixujun.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/1852328894.pdfIn PDF document text
    • http://xevorerokune.epizy.com/lawinakupadafa.pdfIn PDF document text
    • http://lokuvutifinulef.rf.gd/pofalawi.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/82546731599.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/cookworks_1._5l_deep_fat_fryer_manual.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_off0000de27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5540 bytes
SHA-256: faa47b724132add169402caaa674dca511c4d9cf03fe96d916daa6bcce21183f
font_01_sfnt_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 11236 bytes
SHA-256: 84a0f214c0074947402ab5840ccd07faaec28588a8b2e3386393c6f3d75e4aa1

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