Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d6acc7e5a079e7…

MALICIOUS

PDF

72.2 KB Created: 2021-02-23 07:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 50b38accd0b0314636ac532bb32d0363 SHA-1: 3f5f36ce10c2d692ad59b8250e971f73321931d5 SHA-256: 99d6acc7e5a079e79227dcf7ce7d6ed06c86c60cb685203f8dc573fca6aeef65
194 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
  • 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.
  • 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/aws?utm_term=the+best+bible+dictionary+app+for+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_601a85ab78d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489599/normal_5fd32daf61938.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/jbghOgj/wafonijubetalulavinadujog.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/jehgJjB/photo_puzzle_maker_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_600ced50ccfec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386366/normal_6002178d84a34.pdfIn PDF document text
    • http://nuxemuxexajimo.22web.org/top_android_high_graphics_games_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/igrOYii/ruwugugije.pdfIn PDF document text
    • http://wutukuk.22web.org/wepedumaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455375/normal_5fd5ff3004f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_603475e946775.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/fyjgvJg/mumadefajigov.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/pewebopufupe/91461168372.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/80252083824.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/blood_pressure_guidelines_by_age_2017.pdfIn PDF document text
    • http://teraropabu.epizy.com/difujatefufizarodabar.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/jovujivela.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/98591148184.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_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 5432 bytes
SHA-256: c5b64e10516f88914bf493943e8879487ff9e5218fe4d58c105a7b67721fbe6f
font_01_sfnt_off0000efbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBB 10604 bytes
SHA-256: 9bd6acab7c7fc6688439828d7bfcac9cde5b10147d3cf219005dfbd1a68b57f1