Malicious PDF — malware analysis report

Static analysis result for SHA-256 838852fc99acd307…

MALICIOUS

PDF

68.5 KB Created: 2021-02-06 11:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4714cbfe5cb61a85a2a7de5fc8d08b88 SHA-1: 7e03a1d50c6241aaddabf26daedbaadbcbe73876 SHA-256: 838852fc99acd307f168b13877628cd62b8017d0f3b36bcdc65a65501e754dfe
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://bologen.ru/wb?keyword=avery%20templates%205162 PDF link annotation
    • https://cdn.sqhk.co/zabeluzitema/jg9hdIM/92801331131.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/HLENifk/buxufatanotoxuzuw.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/gggj9hg/ninja_vs_zombies_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/hfggwmk/wozon.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/c6iecZa/tapuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486758/normal_5fcc4fada9274.pdfIn PDF document text
    • https://cdn.sqhk.co/sirepajaku/hhfjgib/lusetuma.pdfIn PDF document text
    • http://sokelekife.iblogger.org/darenoguzes.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/ajcijnA/sifek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378605/normal_5feb2b6e020c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482188/normal_5fd1e70b99e4c.pdfIn PDF document text
    • http://jigitozunawada.66ghz.com/invicta_watch_battery_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5fd14d8962baf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidewoxawutose.epizy.com/psychology_intake_form_template.pdfIn PDF document text
    • http://dereduvate.epizy.com/candy_camera_latest_apk_file.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_off0000cdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAB 5580 bytes
SHA-256: eb154465e44a9be7d315520f5b457e2a1efb092c7a1241b7a0ab709879e5f880
font_01_sfnt_off0000e0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AD 11000 bytes
SHA-256: f997cb2a6d77ac8546dfe56f5fe883e448b0097e7ec7003db0e71459eb798946