Malicious PDF — malware analysis report

Static analysis result for SHA-256 186bdd9046f16c1f…

MALICIOUS

PDF

71.4 KB Created: 2021-02-15 05:38:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4d6ed9971aed5b10eb5a03ef73f72e99 SHA-1: 7c90665ee868770681f7111bdab515b7daf28b58 SHA-256: 186bdd9046f16c1f55461457802ed8240798de56a9366499f1642fe7eaf121c3
254 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.
  • 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=theodore+roosevelt+elementary+school+indio+ca In PDF document text
    • https://cdn.sqhk.co/fegadosijete/nieXhdT/9106477095.pdfIn PDF document text
    • https://vimixake.weebly.com/uploads/1/3/1/1/131164471/gabisepunibena-korivovuzi-tufanowexin-bizitopusu.pdfIn PDF document text
    • http://gixelube.iblogger.org/demon_slayer_episode_19_song_sheet_music.pdfIn PDF document text
    • https://gubizotalu.weebly.com/uploads/1/3/1/8/131871644/6035526.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/T5Rbjjx/xulusitafovaxetaxowudewaf.pdfIn PDF document text
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/6839439.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/1jjy0cw/jurassic_monster_world_mod_apk_rexdl.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/lebebipel.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/6653816.pdfIn PDF document text
    • https://pazisurezufil.weebly.com/uploads/1/3/4/5/134594691/wokeg-rusorovivew-tadanetuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/wobimore/0pjh3rT/21803923876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralivapoked.epizy.com/lajepotisudiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/39992894767.pdfIn PDF document text
    • http://vuropomap.epizy.com/transactions_essential_english_language_skills_guide.pdfIn PDF document text
    • http://duzujijola.epizy.com/nuradaji.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/clinical_trial_protocol_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/nuwasalulovugosibegu.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/wolajuz.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/gro_egg_recommended_temperature_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/84427559919.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_off0000d98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98D 5292 bytes
SHA-256: 7a6654abb4cdbf787ddb8d5b0020665510207e51bc18400408c5527b9fa343a9
font_01_sfnt_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 10796 bytes
SHA-256: 5dcda9a6aca0e8bdb970501948684459dce2d0def7ad0d3a93d288b5ee4f6d2d

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