Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d752ce65c71aa9…

MALICIOUS

PDF

43.4 KB Created: 2020-10-28 11:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b92ecc42e4ece0c1a4fa16507633139a SHA-1: b1ae70ee62b04c0b4326ab19265f69fe9d5e6e1c SHA-256: a3d752ce65c71aa9f2daf9b242980b769e16898258062f5fcabd555959162425
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=chocolate+milk+calories+per+ounce In PDF document text
    • https://kufesolujuxubi.weebly.com/uploads/1/3/4/3/134373324/5ff2df09861a9.pdfIn PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/5653360.pdfIn PDF document text
    • https://dazowuxope.weebly.com/uploads/1/3/4/3/134319454/radusatawiged_sudam.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/mowuruzovem_rasij_lakupako_madikomojuzom.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/kedoxezezaj-temolej-zunemalavorun-mutelokowomimi.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/lamuloganon_zugoxulop.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/1/0484/6898/3969/files/98670633164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6629/6986/files/symphony_of_the_night_100_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7612/7394/files/communication_theories_in_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8335/0687/files/ridgid_table_saw_r4512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9909/files/blades_of_glory_parents_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/cuestionario_del_modelo_servqual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4972/5335/files/nuponoxovixemexizopijonev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9081/2821/files/vilogobefopefevekumobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8304/5298/files/drivers_ed_state_test_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/wanpanman_manga_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/0383/9140/files/pimut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3ea7b2-b773-4d25-8b28-dc0a0b6abe7e/91860229635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e06b48-6327-45c9-a549-254f0c4e1ae9/97811052366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b21552-a59b-4d4e-b53e-edac0b802236/mitusor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3116ea5-3427-4f31-9b95-d614a8f7b0aa/47482297482.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_off00006af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF7 5144 bytes
SHA-256: f592cd00697ad6a413d7abc23abd52e5cd33130444dfec605df1b8165b397271
font_01_sfnt_off00007c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C47 10444 bytes
SHA-256: caa5c81565fe09090f16b9a5a5f997f0214c2c3eff8d6db1c5fbdc34f3b3ffff

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