Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f2830e66747cb7…

MALICIOUS

PDF

43.5 KB Created: 2020-10-26 09:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: bf8df3efa27410268a84affeaf343d2b SHA-1: c01d06cb3540b47c57f324ee90f2291ce4ea2c48 SHA-256: a0f2830e66747cb70f2af2b7fe977c06f9dfc753414c4616d7f7852f3d2713ab
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/aws?keyword=hallett+cantorian+set+theory+pdf In PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/ccc27.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/baputedev.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/jeziwaradovagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f8bd707f1ad0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8c6187a3de9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_5f8e43db1fdcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402280/normal_5f9627d0f2cc2.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/kawizorimasami.pdfIn PDF document text
    • https://topagolidokade.weebly.com/uploads/1/3/4/5/134502990/37e31f635ad658.pdfIn PDF document text
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/regubuxowomate_jugobuvenabi_julub_jexas.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://s3.amazonaws.com/litunux/cognitive_behavioral_therapy_adhd.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/annapurna_devi_stotram.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/17189477737.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/bending_light_experiment.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/wizobipuwosi.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/32721866479.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/vasogefelop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/uscis_vermont_service_center_fax_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/european_court_of_human_rights_statute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8583/3410/files/wezagudofosusukupuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5927 5096 bytes
SHA-256: 853e417ef9af7698049e58a198502fe9ee70996b5ef75fc33b309c29252761db
font_01_sfnt_off00006a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6C 12752 bytes
SHA-256: 612563bd4e758bf405e2d804312550c8d2691606dabfe6adc760f2e92d6db6e1
font_02_sfnt_off00009292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9292 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361