Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94e8be25f9b1cff…

MALICIOUS

PDF

137.3 KB Created: 2021-08-16 22:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 32e5ed87c20f86f2f6f9095511b19ad5 SHA-1: 1e2a7f16d876b24d6dc75a8a5e054fd5eee887cb SHA-256: e94e8be25f9b1cfffa75a5d405d99a21eec87d199fedbfe327aceec4c9e7b4df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for distributing malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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 https://archism.ru/uplcv?utm_term=teoryang+formalismo+halimbawa+ng+kwento PDF link annotation
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608395a131c36---rewuv.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdcd6a7fa2a---7238657194.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/rerixixu.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/74068720709.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a73e79be9be---xofuretesaduvamus.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d50133670d561c180a82221355dc120a/29715984131.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/89741852023.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/99788080805.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c427df94611---52180781487.pdfIn PDF document text
    • http://redfordunion70.com/clients/869360/File/zidunide.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fa8aa6ab1---26858335666.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ab51906b4---rajonakave.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/63294298318.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/jonapitovonotomusiw.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/vururaxumov.pdfIn PDF document text
    • http://daebokjungdb.com/uploads/files/64327402760.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/m30f0selvlgsfj260unac9enku/mojemiwuniz.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/4g8fbcva053ir9noikr128e5g1/64562749632.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16074264db6bdb---vevowowulazuxag.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/xijasirupibidejaleje.pdfIn PDF document text
    • http://narzedziascierne.eu/Upload/file/45820542483.pdfIn PDF document text
    • http://614move.com/clients/4890/File/kipapokol.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/37507172915.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061812463136.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001b64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B64D 17660 bytes
SHA-256: f226b0a352e914e2acfd34b5ef7c36285d54ee7d87d5274ce8734f0cf186782f
font_02_sfnt_off0001e430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E430 16252 bytes
SHA-256: d66bf48e304c78f6080084e0c9704384de85738853ce87f784528b0e0784b990
font_03_sfnt_off0001fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA1B 11056 bytes
SHA-256: 6d208d9a4314321a330014c1d109766d8866abed94fe84988b470902c121fdeb

Open this report in the interactive analyzer, or submit your own file for analysis.