Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe5700cead17b54…

MALICIOUS

PDF

78.8 KB Created: 2021-07-06 15:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: de0c7aa8bef80b72e671a421ed2e2ce5 SHA-1: 11805cf0fad78d0fbfe19c8e0c5d13cf8183f165 SHA-256: dbe5700cead17b548fc29d675c7acf8c386a04087ea223faa0bc4cd4d6fc2118
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves a malicious purpose. It contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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 http://ordineveterinarivenezia.eu/userfiles/files/povofudotudowu.pdf In PDF document text
    • http://appartenvue.net/appart/upload/images/23373105961.pdfIn PDF document text
    • https://yuktogel.com/contents//files/jebeku.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/tedufelagobu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/94148210491.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/sl63dqnj38gmk4d709v9t4k2b3/78977861616.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/92697211894.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b60fb0038b7---tanosisaliso.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/kujarokufatumekixo.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b64b74b0c---29342590725.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099afa796b5e---13352941501.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/77447758818.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16097e0d1bda43---sevalasosoboronuvotali.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/gujekokiwum.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079f88b708e7---90916949683.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/wosazibitiwuleziparere.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/2d49ea11755fb1263ded1dab9519754c/kekozafexapupuzaxuvar.pdfIn PDF document text
    • http://sgpeo.pl/users//file/97349584488.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607495d27e0a3---11502196325.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b40b671a04b---70217739969.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/fupatitipakonuw.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83fa80c48---lezofefatab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=800+usd+to+aedPDF 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_off0000d4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BD 16560 bytes
SHA-256: 7137c80f873c6297faf14fa095342b5b8c5bd5e85763303115928a80904e899f
font_01_sfnt_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 10232 bytes
SHA-256: ead5d8a24ce19d3e89adb784af5b09ef3efaf56f07a2cb91526673a2f68f7fce
font_02_sfnt_off00011670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11670 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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