Malicious PDF — malware analysis report

Static analysis result for SHA-256 add7bc3baef8c35a…

MALICIOUS

PDF

72.0 KB Created: 2021-03-01 19:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3394381e9272ac35a7a4c231939165c3 SHA-1: a51025f393af78b434e015179990d4a4db721363 SHA-256: add7bc3baef8c35aa6b90655d8ec230bce4e67d98d63053db8d930937cbe3ef1
196 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
  • 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.
  • 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://nipisod.ru/award?keyword=the+last+leaf+commonlit+answers+key PDF link annotation
    • https://cdn.sqhk.co/nabotogemobe/iiiackh/nofufasifevevugekopek.pdfIn PDF document text
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/3c15239.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/Y6jfpUa/61586075319.pdfIn PDF document text
    • https://cdn.sqhk.co/repipedifavi/ehffihX/mastercraft_2018_price.pdfIn PDF document text
    • https://cdn.sqhk.co/bagudivibi/NiejgG2/london_to_brighton_veteran_car_run_2019_photos.pdfIn PDF document text
    • http://kiwemotoxug.22web.org/kagewamirawozimipupami.pdfIn PDF document text
    • https://rupanusevufow.weebly.com/uploads/1/3/1/3/131380126/modikoti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488139/normal_5fef3c2f912f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474759/normal_6000823bca5ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xarojapi/how_to_make_origami_olivia_paper_mario.pdfIn PDF document text
    • http://kokutofir.rf.gd/7245328368.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/tube_digestif_histologie.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/vegoximewirojuribajozok.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/fortinet_firewall_300c_configuration_guide.pdfIn PDF document text
    • http://pomigijo.rf.gd/98324996181.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/excel_spreadsheet_tutorial_free.pdfIn PDF document text
    • http://ladorum.epizy.com/superlative_exercises_with_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BC 5116 bytes
SHA-256: d010e83efe987bf73ca5c4f70ecf62d5b94c79cdeb2f8a75ef1ae3b097e4b12e
font_01_sfnt_off0000e206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE206 10276 bytes
SHA-256: c928239785f992dfc541fa7b08c889007ea833aacc4f7b804ca541a175c15eab
font_02_sfnt_off00010441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10441 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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