Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4f117f400e342f8…

MALICIOUS

PDF

78.2 KB Created: 2021-02-15 13:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 64a200ec3d5f6b4a1fff759d12a40659 SHA-1: 013fbb7447ba7cf424b9bd045903837988ad74c4 SHA-256: f4f117f400e342f88b7c22105fa1e1610bdaad495439c70656720eda245fd2d7
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://seumenha.ru/wb?keyword=acer%20aspire%20e15%20specs%202017 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5ff35eae9f806.pdfIn PDF document text
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/lepunabezes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495043/normal_600df7e6b4f96.pdfIn PDF document text
    • https://lerojapozexux.weebly.com/uploads/1/3/4/0/134016693/836c8d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_6028b60f8fba2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379606/normal_5ff04658cf24d.pdfIn PDF document text
    • https://tomutoremaduv.weebly.com/uploads/1/3/1/3/131398477/eb1ae69d4496e.pdfIn PDF document text
    • https://malegudupo.weebly.com/uploads/1/3/0/8/130813961/dibitexesetabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448731/normal_5fd3788359486.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391308/normal_5fcb26dd63528.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/fasomusogapovi/23519824557.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/dosafokun.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/wiripozuwovevuma.pdfIn PDF document text
    • http://vojemigami.rf.gd/iready_teacher_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/the_entertainer_easy_piano_sheet_music_free.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_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 5416 bytes
SHA-256: 35e51399cd99a32ebf6aa0f23ae7de469122f86f432852a70fbe9c6a648b02b9
font_01_sfnt_off0001054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 11068 bytes
SHA-256: a1e289200c98fea963efa982d084efce202e78e28b8af83dad9d33d3fea6ace4