Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b16efbf0d322f3…

MALICIOUS

PDF

72.3 KB Created: 2021-03-01 16:15:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b3862708f17e39b94e45ca50c7c4cebc SHA-1: 751e6d6f690368d19a581bff9dcac86ec2846f32 SHA-256: 57b16efbf0d322f3a69a159118e83fdfc88413b0e468df45c68536cd2e1a8f95
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://gimoguvi.ru/award?keyword=self+isolation+before+surgery+spire PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5fd6523c922ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_6018efad68829.pdfIn PDF document text
    • http://sizijevoji.iblogger.org/kedejuxuvowanolov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_6018f3e277dc3.pdfIn PDF document text
    • http://everydays.space/chemical_principles_7th_edition1ib6w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5fca19657ce25.pdfIn PDF document text
    • http://pedron.fun/whatsapp_2019_new_version_freekeklg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486982/normal_5fe56d14bc0bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413235/normal_5fcb9d2f85184.pdfIn PDF document text
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/273785.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/8c02335f00633.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sebilazog.rf.gd/how_to_read_a_graphic_novel_handout.pdfIn PDF document text
    • http://zuwemanikipe.rf.gd/ada_diabetes_guidelines_2018_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/vujokujefi.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/halloween_potluck_flyer_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/bahubali_movie_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/awei_a920bl_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/viwuxuwonomilaguje.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_off0000deb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB6 5412 bytes
SHA-256: 34bb41216ec1a2617f63bceed372db80f06e421fd60de4332638695ba4f76c32
font_01_sfnt_off0000f135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF135 10160 bytes
SHA-256: c6cc6156c80a48f71c94e59f8d9355d22a2b382ffd47af56064a7348211fa875