Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12116ef1315465d…

MALICIOUS

PDF

42.6 KB Created: 2020-10-26 09:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8bded42c983324d29d794e05daf9503e SHA-1: 56781fec3cc455a943650a990431186f3a151cfd SHA-256: a12116ef1315465deec376f4c8035ea37d3a0c3bff309ba125da0b65eb291e53
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://ttraff.me/123?keyword=baby+clothes+size+guide+europe In PDF document text
    • https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/tawazeru-boripimeporoti-vibutelefepi.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/6b59573d6616c62.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/fulexuxesoxokulase.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/a9313fa24a21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5f95d69c1d4d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f952805bdbd0.pdfIn PDF document text
    • https://xanuvomapimiv.weebly.com/uploads/1/3/4/3/134342034/9663048.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/7989682.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/nukexifepejisox.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000654d.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000654d.bin)
    • https://cdn.shopify.com/s/files/1/0433/4157/8399/files/intensive_and_extensive_properties_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/guzedazujotogiz.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/35021754847.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/65763958654.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/43543530323.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/boileau_l_art_potique.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/ableton_live_lite_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/2019_calendar_2020_printable.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_off0000654d.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000654d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654D 5676 bytes
SHA-256: 906de6e8006d563b88080c39ecb3c790bced79cb9509f2e86ce731ffccc94882
font_01_sfnt_off00007891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 11196 bytes
SHA-256: ff81ae52697a9d187187cf11c5175046f255cfda2cfc7b58ae838be721d6565f