Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51751652188cec6…

MALICIOUS

PDF

76.5 KB Created: 2021-02-21 17:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d9a942ef65b4c73b09bb2f1cb120cb23 SHA-1: 84345a3483e872984694ef6ab85d006d3eba4af6 SHA-256: a51751652188cec6e30791d8943887a5f23c913d97a5f0e805e5685ad6244d9a
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/wb?keyword=personajes%20principales%20de%20la%20obra%20la%20familia%20de%20pascual%20duarte In PDF document text
    • https://cdn.sqhk.co/jemitaku/aXiehiy/sorovefemakokuta.pdfIn PDF document text
    • http://meblik.su/citation_report_isi_web_of_knowledgetz7js.pdfIn PDF document text
    • https://nematoluzi.weebly.com/uploads/1/3/1/4/131409841/tigufimose.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/jhvcbgh/weather_underground_nyc_10_day.pdfIn PDF document text
    • https://monisobagarov.weebly.com/uploads/1/3/1/8/131856119/ef4d8961.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/gcgd6gg/empire_of_the_ants_movie_1977.pdfIn PDF document text
    • https://vogoniboka.weebly.com/uploads/1/3/1/0/131070279/22d627a6.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/kewakuko/famutuvupuwigodi.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/hiring_request_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/zitudijiwozuk.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/lenticular_sheet_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/89063530693.pdfIn PDF document text
    • http://vowugapawixot.rf.gd/hematology_meeting_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/is_the_common_english_bible_a_translation_or_a_paraphrase.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/4901818977.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_off0000eb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 5516 bytes
SHA-256: aa3e78553aecb754edb08953331661d17fa0b2b3b3b08bad5732f099e40e07db
font_01_sfnt_off0000fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 11428 bytes
SHA-256: cf77d9922ed88bf8a94d43bd250e0e09b316ddbb3ee25376e2d3ac8d97419b41

Open this report in the interactive analyzer, or submit your own file for analysis.