Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c1cb0d542d333b…

MALICIOUS

PDF

71.2 KB Created: 2021-03-04 09:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8cde1f1a4f7e0266d61e367ba6d1177e SHA-1: 3ca9b129e40b147712cead6c8de2742b2eaa0ef4 SHA-256: b7c1cb0d542d333b853e115249416041ed1b4c9b6291f2251424615b9794d618
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://fokemale.ru/award?keyword=d%2526d+player%2527s+handbook+3.5+2 PDF link annotation
    • http://wisatemubudu.medianewsonline.com/how_to_reset_verizon_fios_g3100_router.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500883/normal_5fdd5c668b568.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369505/normal_5fe545a4003bd.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/zusevamasor/opposite_of_loneliness_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/realtek_high_definition_audio_driver_windows_7_64_bit_lenovo.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/how_long_does_it_take_an_ion_speaker_to_charge.pdfIn PDF document text
    • http://gakenefux.rf.gd/cub_cadet_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/beautiful_baby_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/maseg.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/6287952871.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/ronipolim.pdfIn PDF document text
    • http://jitapalerex.rf.gd/lorraine_lea_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/47228911118.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/quality_analyst_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/1873121206.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_off0000def5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF5 4156 bytes
SHA-256: 9253c4ec90eb8b217ae91b3aef6412788d3d1419415539c5cfb70110cf842fd1
font_01_sfnt_off0000ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 10224 bytes
SHA-256: 48d728918d9e63025e0f9b3a9767b910a37a14d28a51579b7e97c2b544b5ec02