Malicious PDF — malware analysis report

Static analysis result for SHA-256 877c52f15b8f9c79…

MALICIOUS

PDF

68.5 KB Created: 2021-02-18 12:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 32f13a455e1801b8383c6215806e8745 SHA-1: 131a08f2d16b84f16ec47110aa03ab20fef3fc66 SHA-256: 877c52f15b8f9c79484d7d4b0929db2c40bf12bc4ed5f09aaefc13f32d94b0bb
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://crophysi.ru/wix?keyword=chris+brown+no+guidance+lyrics+az In PDF document text
    • https://cdn.sqhk.co/runenuti/aScRuhE/daytona_racing_game_online.pdfIn PDF document text
    • http://greyfruit.space/vmware_14_fullhg6za.pdfIn PDF document text
    • http://guwajokuxo.22web.org/karianwala_weather_report.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafaveju/eBzBsgf/super_bomberman_r_nintendo_switch_game.pdfIn PDF document text
    • https://lozorodarefela.weebly.com/uploads/1/3/2/6/132681783/zomiwok.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/mjahjws/lafokurej.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/ragejufa/81405840193.pdfIn PDF document text
    • http://dekuravimej.epizy.com/kundli_software_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/vidmate_app_free_install.pdfIn PDF document text
    • http://dokilenosabani.rf.gd/adepta_sororitas_codex_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/the_bronze_horseman_second_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/programming_arduino_simon_monk.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/1314818257.pdfIn PDF document text
    • http://lenixad.epizy.com/airlift_performance_v2_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/action_research_in_classroom_discipline.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/blank_calendar_template_2018_august.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/business_service_description_template.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_off0000d0d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D2 5488 bytes
SHA-256: c55ee144a39c8914953670504278bb1dc4cc7e67ea3364b564ea01433876afa1
font_01_sfnt_off0000e38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38D 9732 bytes
SHA-256: 1b09f10d6fa807ec82dd04e89ccd5a6f0f700dc3a6b0a366a6184c248dde0ab2

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