Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b8046090821c4e…

MALICIOUS

PDF

70.1 KB Created: 2021-02-19 21:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6c6f0380cb538596984aa82ff99fe257 SHA-1: e34613dde3590fc8fd6a24bbc4c9e7679353f375 SHA-256: 55b8046090821c4ebafd44d6e711b30c6b04cb6aa383a0e5c8b8f20c0fe8d4cd
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wix?keyword=wayne%2527s+world+donut+shop+location In PDF document text
    • https://cdn.sqhk.co/pigajifaw/LDxH4hg/slice_the_pie_review_generator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424692/normal_60177c510893e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452837/normal_5fef9355af2c7.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/teruworo0893e.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/4jju7hi/how_to_scoop_the_perfect_ice_cream_cone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_6017320249828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375894/normal_5fcba77a2dfed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392209/normal_5fff5bd6ea2b1.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/gchaahi/5994473381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_601b6787eeee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_602fb7932eee0.pdfIn PDF document text
    • http://steblin.pro/583354473180j8lv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5fd3b83ee3b15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_602c370603c68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fff2399ee5d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_602c20ed70d7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476593/normal_5fe8d5b914b70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471719/normal_5ffdd28bdc35f.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/kevava/trophic_levels_and_ecological_pyramids_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/ecart_type_google_sheet.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_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 5400 bytes
SHA-256: 633c88451a95211cee315a2391dc28357f066aa11be77fdd87c99d686840d91d
font_01_sfnt_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 10288 bytes
SHA-256: 688a99f232643d3b8a1b203d18b222a3e6effc8bc494993f1e2e6ece399c766f

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