Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef78768a0373835…

MALICIOUS

PDF

72.8 KB Created: 2021-02-22 15:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 58d42cf8fa4e270ce11c52056fcbf444 SHA-1: f14f6fdb7b70fe1de0af40697fc5d3c7dae576c9 SHA-256: aef78768a0373835c56010edc0b4399e251679725c0ed12689414b5086de8aca
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://leonvi.ru/wix?keyword=improvement+guidelines+stroke PDF link annotation
    • https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/256fc6ac.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/5355c.pdfIn PDF document text
    • http://buytoday.cc/pavigobuzuliwixl72t.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/7952164.pdfIn PDF document text
    • http://ogranicbio.fun/85934199621acpyr.pdfIn PDF document text
    • http://x-bionic.shop/clinical_practice_guidelines_singapore_diabetes_mellitus86eh6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5fe87242e447e.pdfIn PDF document text
    • http://uber-global.com/putaf4twb0.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/1ccd0cdaac.pdfIn PDF document text
    • http://chambreapp.xyz/30751343784kxsd7.pdfIn PDF document text
    • http://baby-slings.ru/sosogegowevefipitigibdh.pdfIn PDF document text
    • http://astropsychology.website/applocker_logs_powershelltd0jl.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/46045694287kttiv.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.cIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/43128914069.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/28831168930.pdfIn PDF document text
    • http://zaxalamel.rf.gd/kaxafar.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/scert_haryana_date_sheet_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/zivemij.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_off0000e19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19A 5128 bytes
SHA-256: edd50a93256b9517e62152702106339b3006808f141519f0938c33a25b934ef8
font_01_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 10556 bytes
SHA-256: 6c96946106318f47350529b675f5cc25bce284489e41ecd33e447346d201aba3