Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f32d77835aa6fd5…

MALICIOUS

PDF

64.3 KB Created: 2020-10-26 23:26:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8bb283ae74ad276db23c2929f945cb03 SHA-1: 5f03a9300fccf055b62079ef8099d6b48b907c4e SHA-256: 8f32d77835aa6fd521105ae08f072ffa2edfec39d1ed86eda6c6c080cf940051
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://gettraff.ru/strik?keyword=ss+el+faro+last+recording In PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/5928710.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/662f88ddd5cf.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/8783645.pdfIn PDF document text
    • https://mogazikazalag.weebly.com/uploads/1/3/4/4/134440800/1ec1690b46f.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/zuxezexokomu_jokikin_rajabajota.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/davix-zipavekewijuzum.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/juduk/sindrome_de_abstinencia_por_nicotina.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/second_conditional_reading_comprehension.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/perasiwididoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7264/6046/files/8th_grade_graph_linear_equation_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9818/0251/files/waxemukewofipenezobodalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8494/6850/files/historia_de_la_literatura_universal_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2451/7790/files/sportsmansguide_coupon_code_free_shipping.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/zubesos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/5352783871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1716/0862/files/36071720165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5291/9703/files/faxosokovowupanapig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2733/1734/files/aerosmith_feat._eminem_-_dream_on.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B7 5292 bytes
SHA-256: ccea431278f5c87d91c754a669e1d1f653656afae62dcb854a954bd7e3691e12
font_01_sfnt_off0000baba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABA 10548 bytes
SHA-256: e423365783e07355aac3cdcc4496fe8c0ec0667d8cfe3a40d60071e6352292d9
font_02_sfnt_off0000df16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF16 16028 bytes
SHA-256: 8345d1cc2b6b461b856d0454e2cf67edf5851291b6d0ebf21a7da0c9813a2b7f

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