Malicious PDF — malware analysis report

Static analysis result for SHA-256 7861df8ff110ec9f…

MALICIOUS

PDF

45.6 KB Created: 2020-10-27 10:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-18
MD5: 0b74c4549ac75686bfe1f22f655b10a4 SHA-1: 5f147901030767c1f7d430cbc169d63ec3e5ffea SHA-256: 7861df8ff110ec9f6e9cd730214dbf444647b1b66c46e0aac61413dcf9531aa4
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.me/123?keyword=banco+de+sangre+auxilio+mutuo+mayaguez In PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/3758324.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/poruni_rujugedidov_jixagiperedari_mevotano.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/8929622.pdfIn PDF document text
    • https://nadazeva.weebly.com/uploads/1/3/4/4/134499610/6952372.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/d4f70825.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/patabepogi-denuwamalutez.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • https://lezivefa.weebly.com/uploads/1/3/4/4/134458465/4231971370.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/tolafet_dipaxenovu_bopirix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vunizi/22990743508.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/48794648335.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/mathematical_finance_a_very_short_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/understanding_and_using_english_grammar_betty_azar.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/introduction_to_spatial_econometrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0892/0222/files/11133958065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/refukojat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/saveporif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2800/4039/files/60595537219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/5625/0013/files/walmart_lost_receipt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5248/4766/files/work_from_home_nurse_jobs_las_vegas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2232/6680/files/43907358042.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/mathematics_quiz_questions_and_answers_for_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/boundary_layer_concept_in_fluid_mechanics.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/40411792805.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_off00006f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F31 5528 bytes
SHA-256: 9b7be29251f441aac7490c1f95579085d3ed625c8166b227bf4bf9d846399931
font_01_sfnt_off000081f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F1 11244 bytes
SHA-256: ec20ebbd16554c681a04ce56f996fba5a95c1731a406d9479691cec3049021b1

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