Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8f04ce2de7831c…

MALICIOUS

PDF

84.3 KB Created: 2021-10-08 02:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d694c3684bd712bc7534097046c7d7c2 SHA-1: 3b663b6d579f8346e8968f3b5afdb9045ab9d249 SHA-256: 1e8f04ce2de7831cd6683042c6263f318e6e6655793d52e4aea31e538b485a08
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of urgency language further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dzido.pl/userfiles/file/sobujijeda.pdf In PDF document text
    • https://minhkygroup.com/luutru/files/dajumevupotewavinomeguwi.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149c00386903---kurobewu.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/begosegapudamaforibudabib.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/kawogikomamubo.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/29496584621.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/jimuni.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/301038187.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/41447621433.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210923151847.pdfIn PDF document text
    • https://toscanafantastica.com/userfiles/file/94081797342.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1613144273d26a---bubipatavadafesepo.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/97739853821.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/beripiveja.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/xogiveta.pdfIn PDF document text
    • https://pellevah.com/upload/files/bimerewixig.pdfIn PDF document text
    • https://mapithanhcong.com/upload/ck/files/18547477544.pdfIn PDF document text
    • https://sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16155ca50668de---39330611324.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/zewejaseme.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/zetiramoxisuwew.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/73868009743.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/bofutipudojexaku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ccc+objective+question+and+answerPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F7 11016 bytes
SHA-256: eceac99a167325d4ebc2dac7237db4ccec126a01b8c14394918f8491ac7b233d
font_01_sfnt_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 18364 bytes
SHA-256: 582bb5006da867c3b2bf3cdcdcc775395d614c84a26bfd497213ff16fbbbe570
font_02_sfnt_off00012bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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