Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e75d2983ec888b…

MALICIOUS

PDF

44.2 KB Created: 2020-11-09 09:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7bde536eb0a7701b1e284632989868a7 SHA-1: 07312f04b0dc7d286817e99e4c2b7d88905df057 SHA-256: a6e75d2983ec888b2b6d4a5b01dcd67109ad8bdeb121cf45e16f76072d70252e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffi.ru/aws?keyword=stock+selection+guide PDF link annotation
    • https://buwabasowo.weebly.com/uploads/1/3/4/3/134353515/foramadiz-jaraguk-jamuz-pogudi.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/6853312.pdfIn PDF document text
    • https://fojigexo.weebly.com/uploads/1/3/4/2/134235048/784168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5f9477b8389bd.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/tabenumanipizup.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/tevurepizenebur.pdfIn PDF document text
    • https://teguzefememefa.weebly.com/uploads/1/3/4/6/134609716/pedonexowagel.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/domegagowevag/55482091538.pdfIn PDF document text
    • https://semumawi.files.wordpress.com/2020/11/94473184276.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/dubusanipipoxigegojigol.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/wejewonazaleve.pdfIn PDF document text
    • https://zikatudaxad.files.wordpress.com/2020/11/lutej.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/24525255535.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/dodge_durango_srt_hp.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_off00006bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF6 4968 bytes
SHA-256: bfab161e0da5b9c6646429c6b3951e13082f9fde911a64ca49f06f3fed6c14f5
font_01_sfnt_off00007cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF5 12128 bytes
SHA-256: 8b3fb81c5f1814c1fadbd8b3bd572d36c69cfcf9c79cf5c37e8b61d3d0ce2550