Malicious PDF — malware analysis report

Static analysis result for SHA-256 09146c865901e810…

MALICIOUS

PDF

71.9 KB Created: 2021-02-19 09:14:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dcb59c4508b608f2a3a6a889e19dbf8a SHA-1: b6e8f7fc632e180c5ae6f6d3eb15a19b89d9c574 SHA-256: 09146c865901e810b2dfe6a551ce8eb1845adb134d6984919684f0f9227e29e2
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crophysi.ru/wix?keyword=narrative+paragraph+graphic+organizer In PDF document text
    • https://cdn.sqhk.co/kedilexele/jeibhcz/trivago_ads_annoying_2020.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/4e22d7807da449.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/reguviratevi.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/xujerusowewak.pdfIn PDF document text
    • https://sugasukeni.weebly.com/uploads/1/3/4/8/134878852/dojafidoso.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/VkpuieX/monsters_for_toddlers.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/fibupetazafifop-nuwawu-bewipi.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/rekorewexidiwo/free_kindle_app_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/ccss_math_activities_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/powifatuvinutij.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/rachmaninoff_all_night_vigil_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/sikenigajuwula.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/tenses_advanced_exercises_with_answers.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_off0000de91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 5064 bytes
SHA-256: 6aeb8ec7043c1c6e8b6043588dba8cd1ff1c37c6d0bdc409abf4f6153aff6148
font_01_sfnt_off0000efe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE1 10120 bytes
SHA-256: 39a7cc3621ff3ca09a20d5e3dc4b77dc5c6d865e8afb0c718d3016d665a7d7b4

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