Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88f27c4dd43744e…

MALICIOUS

PDF

45.8 KB Created: 2020-11-06 03:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: aa973b409518d6b76916923cb6c2bdf8 SHA-1: 01e1d132ef4b34b8024b2b3efef2bf67f549ff32 SHA-256: c88f27c4dd43744e7fca1c80d8d574c200de0c02b824e9ca35d44bc7d1f21868
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafftec.ru/aws?keyword=diffusion+and+osmosis+lab+answers+chegg PDF link annotation
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/rarosaj_lemepagega.pdfIn PDF document text
    • https://kifenefaru.weebly.com/uploads/1/3/4/3/134327755/nitanak_zudovutobura.pdfIn PDF document text
    • https://menerixejujup.weebly.com/uploads/1/3/4/6/134605313/6bd82d11fca.pdfIn PDF document text
    • https://repumuwijuruto.weebly.com/uploads/1/3/4/4/134469056/7631996.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/b7d50e2acf269.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jozetej/minor_magical_items_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/matthews_middle_school_8to18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81b5f82-18f8-43ab-a33f-db2d6e93d89d/65967524218.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/abstract_noun_worksheet_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/prefix_suffix_root_word_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e852f1f-9959-4fa7-b5bf-804fd1775259/wow_7th_legion_rep_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/litosuzuwaxij.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/85941572032.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 5468 bytes
SHA-256: ca4fe4d58725202962d1c3acdd2004368e7d384875af186fcb80fa77dd6d2681
font_01_sfnt_off00007777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 10616 bytes
SHA-256: e9df34eb10edb240206c7a3dbf30b44f76c40b10ced20429c66cc3204103e34a
font_02_sfnt_off00009baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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