Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c091e91544ef2e…

MALICIOUS

PDF

34.4 KB Created: 2020-11-06 04:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 9663226d692855a2269681a953e2f17c SHA-1: b11b05726fdfd77ee7beb1bb4dba6e8c77e26a12 SHA-256: 72c091e91544ef2efa8eb104eb4536f911ded5c469d991f42bd3300abad37bb1
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffine.ru/123?keyword=literary+elements+review+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384046/normal_5f8e86d44edf9.pdfIn PDF document text
    • https://muborite.weebly.com/uploads/1/3/4/4/134442605/6486387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5f952f8bb5540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416514/normal_5f9e3a40ae188.pdfIn PDF document text
    • https://ruwalabipuges.weebly.com/uploads/1/3/4/4/134465281/804fbf37996e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383925/normal_5f8c487ebfca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413838/normal_5f96f253c4c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5f8dcf8b58cdb.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/66666e4d6f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5f9bf47dbc53b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/honeywell_quietset_fan_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4272/4759/files/teen_wolf_season_4_episode_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/the_deepest_well_book.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_off000049a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49A2 5184 bytes
SHA-256: 03a66537dbefb003e08488f313da9ad43d672c47002604378958aaa3414445c5
font_01_sfnt_off00005b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2F 9688 bytes
SHA-256: 1691fa4700fdb2208d4669f9ee7a5f1678b71a2d61eb188c00e9a0f826511a1e