Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce25391d8f58439…

MALICIOUS

PDF

55.6 KB Created: 2020-10-28 14:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 556c95d819a4723ebd8c5d835bf4a880 SHA-1: 699fb62eea9d73f1c81e866aa28b374f33e52176 SHA-256: 9ce25391d8f584399d134e6d91b81ea7b2bc386ba63ce662a2ad4fccd25d9a8e
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=specific+heat+practice+questions+and+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5f8f464b6264c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_5f9774316c344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f89b61b89e83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f936c71e4ea3.pdfIn PDF document text
    • https://vivazezege.weebly.com/uploads/1/3/4/0/134041722/wisariwopa.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/4235858.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/8198299.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/5827209.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/lemitapafipidi.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/0491d8.pdfIn PDF document text
    • https://xutewosabog.weebly.com/uploads/1/3/2/3/132303209/2f093d4107bb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_5f98e04703d5d.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/f40649b8.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000098a6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000098a6.bin)
    • https://cdn.shopify.com/s/files/1/0483/7261/3280/files/torment_by_lauren_kate_download.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/mx_vs_atv_reflex_cheats_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/costco_in_salem_oregon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/wie_geht_es_ihnen_translate.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/zikupokorotorudigavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5386/1032/files/12304809282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9737/5388/files/foxit_reader_print_protected.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/gojik.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/24369734665.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/mizobalezilefuxosupebavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9006/0457/files/rafomibalivof.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 extracted file (font_00_sfnt_off000098a6.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000098a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A6 5532 bytes
SHA-256: 9bb524b8250788e4d570a8db2b0b2fc98a1c976ae9e94723a13c68f7054d9212
font_01_sfnt_off0000ab80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB80 10936 bytes
SHA-256: 77866ecbaacf3c9e27fdf0637ca8c157f1dcb21b8177025d84edb82973437b3d