Malicious PDF — malware analysis report

Static analysis result for SHA-256 084f3bb7b8ed5794…

MALICIOUS

PDF

44.5 KB Created: 2020-10-17 06:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ca44d785ad933d4853acc784fc66060d SHA-1: ac75e4f4898c8876762907fd025a21e08391c509 SHA-256: 084f3bb7b8ed579442c5780c48c0dbee5b885531e59bff63ddc379afe153396d
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://gettraff.ru/123?keyword=connecticut+permit+test+manual In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://givexikiduxa.weebly.com/uploads/1/3/1/3/131398224/podud_peres_bupitinesalojew.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/9639254.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/1/0499/0867/8814/files/trileptal_side_effects_rash.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5060/5977/files/two_fluid_model.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0910/0957/files/pabobetivoguvozajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7578/9488/files/how_to_draw_cute_stuff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0462c38-3e49-4921-8e03-7887cff95be0/88703922032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d58979d-f8c4-4b9b-aa0c-d9d5da42a323/pajukutavagisajawexukata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23fa7dee-639c-47b1-9120-96e854bfb3b3/28242698390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942491a8-7202-4172-adbd-e0db2c5abafe/xoxilekubapurixed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/537702e4-83c9-4a91-9ad8-ca3305315689/10896398489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aed06f7-267d-438d-b2f3-a1893727e3fd/grey_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503416e6-db3f-4baf-922f-5a626ab99eef/cnn_spin_off_crossword_clue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0386/9846/files/gesuwegeki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8837/0582/files/basics_of_economics_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3746/1160/files/73323016761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5466/4342/files/repanawezolurafudeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1349/9803/files/peppered_moth_online_simulation_answers.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_off000071f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 4984 bytes
SHA-256: b839976dbd3bfd041a68a819a1759a640127c7666437f5f51d5174fa74b33f15
font_01_sfnt_off000082c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C0 9848 bytes
SHA-256: 74db4f52ad455f88795c30eaadaf07eba729b47f8c161b8233beaa92ae33c86d

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