Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fe73cb031a9e39…

MALICIOUS

PDF

49.7 KB Created: 2020-10-26 00:12:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 9d8faaa1afa5f1d0747d719c0c60ff10 SHA-1: efb23b4c3881db2d54a080bb566a76d54d49d160 SHA-256: 28fe73cb031a9e398d431e63dad85abf4eb8785206d2ecc103a6c6cd0e57dadd
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://ttraff.link/pify?keyword=3+phase+transformer+theory+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f91109e59edb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_5f90f593a94b5.pdfIn PDF document text
    • https://gijakumode.weebly.com/uploads/1/3/4/3/134306186/dotosanupuzuj.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/1d4a2397ad6f2b6.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000075c6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000075c6.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off0000aae3.bin)
    • https://s3.amazonaws.com/fasanag/73311178067.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/wunelezapaxavekugegapopa.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/gegila.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/zodolatiterewujoburixadew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/mm2_value_list_updated_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1325/9431/files/satire_analysis_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9297/1172/files/nelodojijazuwilodefipijod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0469/8534/files/games_like_hitman_reborn_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/petav.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/music_festival_brochure.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/4393810278.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/fanibibomuz.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/95639856722.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/bin_sachivalay_clerk_paper_download.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/85724369932.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/12749452925.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 extracted file (font_00_sfnt_off000075c6.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C6 5160 bytes
SHA-256: 6e13ed27dedf7c8d946a27a3002726fd32e21cfa7bd7862033daf2b6295da6cd
font_01_sfnt_off0000871c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x871C 10492 bytes
SHA-256: 6a4f4e6819196686b631393ac3d24290beb6520cf72387bba76b0395f85f82c9
font_02_sfnt_off0000aae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c