Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd8cbc575677ca6…

MALICIOUS

PDF

84.1 KB Created: 2021-02-21 14:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 74834c356fba1dd6f6445c2c0740acd1 SHA-1: fb96e3aa2f7ec83c6f379acf4aca6282d75ac9f1 SHA-256: 0bd8cbc575677ca69b1dad7dacb744e940c36c0794f2c2f4fecf8cdc6d85cb97
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=house+of+night+otherworld+found In PDF document text
    • http://circleshtang.xyz/bcbs_appeal_form_arizonab3esu.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/zawobudalavani.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/YultHfb/lyrical_video_status.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/1Qli5Rh/47158099502.pdfIn PDF document text
    • https://kigovedinefetup.weebly.com/uploads/1/3/1/3/131384362/tufaridaziro.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/7535523.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/jbiggip/14394123022.pdfIn PDF document text
    • http://cparta.moscow/18444731227w6ikf.pdfIn PDF document text
    • https://cdn.sqhk.co/xoraxuvonaf/ieyR3jj/lightroom_presets_free_download_desktop.pdfIn PDF document text
    • http://atlas-copco.su/how_do_i_cite_the_declaration_of_independence_in_mla4az62.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/agchb6j/89356868531.pdfIn PDF document text
    • https://cdn.sqhk.co/naxudufejik/hfihvG8/hitman_marrakesh_sniper_assassin_master.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zebigibozudival.epizy.com/sivijijuvokakerowixat.pdfIn PDF document text
    • http://sufapanizesemot.epizy.com/ardab_mutiyaran_movie_song.pdfIn PDF document text
    • http://lujotuxubegu.rf.gd/50229133277.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_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 5012 bytes
SHA-256: 88b19f701984616b2bbc6f036654213dbdc979cee00137cfe962801a5beca979
font_01_sfnt_off00011ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA7 11100 bytes
SHA-256: 00589b53d7a6e527db0da352b3b5fc6053db052e29f32979aab5814e85f8ac60