Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c0aea8c9448b0a…

MALICIOUS

PDF

72.0 KB Created: 2020-10-31 16:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d3305be08f3953d0463ba5c328134730 SHA-1: daa5cf2be2c44c31dab0eda1a10c0b7dd971926d SHA-256: d8c0aea8c9448b0ac1c4b3f86829422e184d540b7b94e2d25b7466b4c9831579
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.club/pify?keyword=anne+of+green+gables+book+5+pdf In PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/rudud-sugego-neludasovilobox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5f99e656a1cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391008/normal_5f98d7e41e7d6.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/1/0266/8888/0821/files/9_25_as_a_fraction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9195/8196/files/tozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9079/5426/files/total_war_3_kingdoms_unit_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/jumbling_reasoning_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/3660/3045/files/29774016565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9270/6207/files/jozunapamedupi.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/vocabulary_activity_cellular_crosswords_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/21257455537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8588/7167/files/physical_half_life_and_biological_half_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/weekly_schedule_template_with_hours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6235/1803/files/gry_online_na_2_osoby_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/97017779687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/88818824379.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/46454143001.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A2 4316 bytes
SHA-256: 40848dd1f4395bb9882287cbb4e05efe897b4d8b01bdcdefe4772d08aa3162a6
font_01_sfnt_off0000d6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C8 5524 bytes
SHA-256: 7fb0d2885109c805d42216c1d5f1dc726b56b7ab247514ee3dc6321e80feb012
font_02_sfnt_off0000e9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A3 12928 bytes
SHA-256: 0931fcbcc8952059612bbdda6b2e80eca8fac983a745131e2f5c928ef1970d7b

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