Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1c8f03242b54e4…

MALICIOUS

PDF

71.7 KB Created: 2021-02-24 02:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 212ae8f102df75abf0e68cc67bea7ede SHA-1: bd8f17728763777f08d6e960151a6f48bab8cc2e SHA-256: da1c8f03242b54e4abb84d4ce41fab61e9fb2ed529d6ab09d4e3cd9ce30d63ca
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wix?keyword=coral+reefs+1+abiotic+factors+gizmo+answer+key+pdf In PDF document text
    • https://midumusifefo.weebly.com/uploads/1/3/5/4/135401272/588bf.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/edf653d79a167b.pdfIn PDF document text
    • http://jushq.pro/august_month_current_affairs_2019_testbookn7tfz.pdfIn PDF document text
    • http://fineagencyy.com/aadhar_card_mobile_number_registration_offline_formix71n.pdfIn PDF document text
    • http://everydays.space/bosch_appliance_installation_manualsthai5.pdfIn PDF document text
    • https://magenudelekoj.weebly.com/uploads/1/3/5/9/135975171/0ccc470815376.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/gozifep/major_depressive_disorder_treatment_guidelines_in_japan.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/vidmate_video_er_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/92248234958.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/39658768973.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/yii2_adminlte_basic_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/panda_vpn_apk_cracked_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/acls_drugs.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/77871994001.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/58038860117.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/bright_netflix_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/lonedefabipetewij.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/criminology_board_exam_reviewer_question_and_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_off0000d930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD930 5880 bytes
SHA-256: e265ad5b1b40b1e767837e2ad9c86fffce29733a9c079c6d21a580d9f2e9e1d5
font_01_sfnt_off0000ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 10484 bytes
SHA-256: 1acdad6c8747f4efc58bd3b0ddfc0a877a2115f7e1db1169b276c98667cf9cda

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