Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c34ef1945bab76…

MALICIOUS

PDF

47.9 KB Created: 2020-10-19 10:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6becbc32f626584af304743be79a5b64 SHA-1: 32ba207be2ced83760d092e846ba21d3bc0640f6 SHA-256: 49c34ef1945bab76cad1b74654915325cf85392e6001e5a4da3ad51a6da1e4fd
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=aashiqui+2+songs+free+download+hd In PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/169792.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ef82e0d.pdfIn PDF document text
    • https://dowamiwimeguv.weebly.com/uploads/1/3/0/7/130775936/1361202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f8d22984a46c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f8a781c5bd1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f88b592c77a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5f86fb2de40b5.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/teruvivelutitezu.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/4325952.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/199877.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/jimik-zisefi-lupuso-bubudabux.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/1/0499/3299/2674/files/45896439912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/wilbur_curtis_parts_manuals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/the_guide_chapter_summary_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/japanese_school_shoes_white.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/vocabtest_level_f_unit_5_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5054/files/creeper_world_3_reactor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/fumukukirakezalivure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787a5372-2a28-436c-8596-f48ff58c8657/rapapozuzap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d53be3-5e98-4952-a66f-5a2e72544187/55073760569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47cd5b62-2983-4359-a163-a5326d7c314f/6103908280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51454fc8-a58b-4d8a-9888-2e09982f2ef5/gijifikuwadujojotenoxeni.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_off00006ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF1 5508 bytes
SHA-256: a40aac05e894bafc03ffeb2441edeed91a7e2222012e2ca5d001a2a54fef7f2e
font_01_sfnt_off000082ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AB 14732 bytes
SHA-256: 57444792968cf6a65d607d7ff50a93fb3798094b84c36437e151786b4a99d084

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