Malicious PDF — malware analysis report

Static analysis result for SHA-256 8128b731e8a47760…

MALICIOUS

PDF

45.5 KB Created: 2020-10-14 22:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: ca26eadf148da72f7126fa95c2080f96 SHA-1: 121b8a35a63465367cd0fcfa6df6ab07cac6a852 SHA-256: 8128b731e8a477608017aaa37c21c2185ae54dc14e0b8fa8e4ed729bf6107f74
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=the+verbally+abusive+relationship+patricia+evans+pdf In PDF document text
    • https://site-1039762.mozfiles.com/files/1039762/36354825363.pdfIn PDF document text
    • https://site-1048550.mozfiles.com/files/1048550/55222074024.pdfIn PDF document text
    • https://site-1043494.mozfiles.com/files/1043494/robarogabilovatix.pdfIn PDF document text
    • https://site-1036652.mozfiles.com/files/1036652/fubifajoji.pdfIn PDF document text
    • https://site-1038407.mozfiles.com/files/1038407/11836546244.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/gevoderovepiru.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/7373486.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/bigunurusipota_vovavubavuw_malolipesafa.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/7706681.pdfIn PDF document text
    • https://site-1042549.mozfiles.com/files/1042549/30263597034.pdfIn PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/58305632312.pdfIn PDF document text
    • https://site-1042733.mozfiles.com/files/1042733/milefogadopem.pdfIn PDF document text
    • https://site-1041381.mozfiles.com/files/1041381/zosubuzasibidugawalebewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8622/4791/files/what_does_epsilon_naught_equal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5764/2152/files/44764659941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3051/4330/files/99956984281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8653/6598/files/36084136779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5849/0261/files/make_file_executable_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4430/1731/files/8342662911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1261/0457/files/download_awe_inspiring_me.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_off0000735d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735D 5496 bytes
SHA-256: ceb0f157be8f18ec3b3dbbfe4cc9d5caba84bf51f1babec822545e6497df61b8
font_01_sfnt_off00008608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8608 9984 bytes
SHA-256: 2276ff0cf42a26d8aa6360de0ea68816889d5936bb437dbf2dc77970ed9dc382