Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdb98848840106e…

MALICIOUS

PDF

71.5 KB Created: 2021-03-02 05:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ee0a78ee2094bc8ec8b7a3f07e47dabc SHA-1: 82d97af50cbd78d769429b8f67ec59aca58fc0d7 SHA-256: fbdb98848840106ea41d976d678f6b2fd576ad2cfcd2346e25c41ce8414bd803
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=skin+swapper+download PDF link annotation
    • https://cdn.sqhk.co/divoxisig/ikQ9Uyw/loporaxagunepo.pdfIn PDF document text
    • http://totudini.iblogger.org/65518483675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_6013c1d14ccef.pdfIn PDF document text
    • http://rirelavemug.iblogger.org/tipaduxu.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/gcjbIih/ww2_aircraft_carrier_model_kits.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/jhLKcax/valalulizenudu.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/hidielC/english_myanmar_offline_dictionary_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_600d95c8354ec.pdfIn PDF document text
    • http://ziguzuxudatigu.22web.org/78459737362.pdfIn PDF document text
    • https://cdn.sqhk.co/gimatuvuwiw/HLHgiM8/9345545558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_6014692618bdd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://repofifimi.epizy.com/pusoluronukonolipumix.pdfIn PDF document text
    • http://zefepelifepo.rf.gd/tukoteludavif.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_off0000db90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB90 5212 bytes
SHA-256: d87b5d96ca92f53201b6698be0f15a358aa605af7935a82633a639917b37315c
font_01_sfnt_off0000ed70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED70 10472 bytes
SHA-256: b0b36f77573af43b03a55a06f99eb5c9def5804fd437ba0e23ffbded20ecb8be