Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbb58d3b7fdd3b3…

MALICIOUS

PDF

63.9 KB Created: 2020-10-16 15:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f699612f9a8b6f1751be1f1e1c4f687b SHA-1: 9c4f987f79b7c36082f2e06744fd2dbd567666c4 SHA-256: cfbb58d3b7fdd3b3220749ef4fa1b3e8d9c639255686d050faa88e72ecb61006
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/strik?keyword=destilaci%25C3%25B3n+por+arrastre+de+vapor In PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/9b18cd795bd.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/3159862d4cc6f74.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/vexudoris.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/1/0481/5156/0341/files/emerson_32_inch_led_tv_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5767/4920/files/persepolis_rising_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/wagebugugejedafitujanomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6453/1376/files/carte_de_lamrique_latine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9752/0801/files/tadogelufedomimijedumofit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4424/7973/files/92045711127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7558/8262/files/raw_silk_fabric_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0606/6325/files/cthulhutech_character_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8091/8211/files/what_to_gather_while_leveling_bot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/34091522446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0917/0856/files/spiderman_hostile_takeover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2782/3264/files/tetik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3628/5860/files/heisler_chart_cylinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aa40639-dcb9-4fd6-8609-eee01482c0ed/65341625733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6d15dc-0421-403c-9fb5-aaffbcf4db8a/74943612662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ee7d1c-b225-4b2d-91ba-b3b7860462ef/zetajutor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71729a50-770d-4116-b455-5d7ca505a548/8964661091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1871/0951/files/demyx_real_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2906/5628/files/patriots_ravens_stream_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4157/8399/files/69308992980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4797/6611/files/hudson_movie_theater_ny.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_off0000b788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB788 5260 bytes
SHA-256: f88fc66337b52e79d012e0f503090cc6be2db1214e1931e95f3902cf05a0ca7d
font_01_sfnt_off0000c936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC936 12060 bytes
SHA-256: 90cd07da738111bce4ea89ce83625314942875382ca4276a934e5d7389b9acd1