Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e89d54d022e140…

MALICIOUS

PDF

68.9 KB Created: 2020-09-30 14:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 278ae3a223324c995e29fab13d806b27 SHA-1: 7b71087beaf5cd823d9151779cd262215169164a SHA-256: 44e89d54d022e140d91fa91898f41c4f883655e2cd81195cc95bff4daa6b4be5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=aerodynamics+of+wind+turbines+pdf In PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/8947861325.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/62559196420.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/tobesifalanakofafonitezol.pdfIn PDF document text
    • https://site-1037135.mozfiles.com/files/1037135/jozigamamalapigijo.pdfIn PDF document text
    • http://files.spencerkezhouxiao.com/uploads/1/3/1/4/131453143/2276506.pdfIn PDF document text
    • http://files.unearthingtradition.com/uploads/1/3/0/7/130775176/bipoxemalatotakiduke.pdfIn PDF document text
    • http://vezab.stjohnlutherans.org/uploads/1/3/1/4/131413418/pitibu_bamof.pdfIn PDF document text
    • http://files.yfcwolves.com/uploads/1/3/2/6/132683267/rokede-rijotetosika.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/pufuxitoradinubun.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/jajodimut.pdfIn PDF document text
    • https://site-1037026.mozfiles.com/files/1037026/puzagobinolorepaveziwo.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/vimebawogesesuregepa.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://cdn.shopify.com/s/files/1/0439/5171/8558/files/17967226983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6467/1904/files/kilazeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8573/6357/files/way_of_the_pugilist_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/55479555139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/gusojanufunoduralelepigu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8D 5476 bytes
SHA-256: b3300d71891d7f6fcc6e3c8d0f2c88561487d1db490478b5ee1cee7f90f8fc48
font_01_sfnt_off0000bf22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF22 10396 bytes
SHA-256: ffd3e23d48fdf7bf6de2a242f6e09a46303c4c1df37bfbf685a10f8e7dc13f97
font_02_sfnt_off0000e2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F2 16064 bytes
SHA-256: fe122861e8158e69f770b537b34ebcea90de60b8d6f6493873744392b7767c47
font_03_sfnt_off0000f793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF793 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361