Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd144a12ae1a59c2…

MALICIOUS

PDF

89.7 KB Created: 2021-09-08 12:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2d8ca60f463359168b552ad45aa5ccd8 SHA-1: 553a43a0817abe7c380197cbe13a01ae3f5c6ffb SHA-256: dd144a12ae1a59c29c5be09f9140314ba516a71388c5c9e32635774bbea2397e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other potentially malicious sites, suggesting it's used as part of a phishing or malware distribution campaign. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the execution of malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089b83ca2b6c---96467630634.pdf In PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01b30b9fb0---922209025.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/98029752841.pdfIn PDF document text
    • http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/29608050892.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/555345a4655f99fe2e12d399201b0aa8/93144343202.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/35439777985.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/livateritijobamedava.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/32424727712.pdfIn PDF document text
    • http://www.ghidmariaj.ro/app/webroot/files/ckfinder/userfiles/files/38696625212.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c24c4f72a86---21548364184.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/d5d28eb00f06adebef6acf9a54c0c19b/xuxowelemezi.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/texajipumozixegevege.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/worelirexidapi.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/9928116656.pdfIn PDF document text
    • http://santeh.md/img/files/75761138828.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/42753216061.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/81194743362.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/50a54fca5345cdbe3a2239fb8755c922/59722543457.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/30237685793.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d3f7587dc---6903266877.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161254dc123e0b---67558731226.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16132a3cc06be9---boduzevosowe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=manual+defrost+refrigerator+freezerPDF 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_off0000f8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BD 18336 bytes
SHA-256: dab3f4d6f6b208a2a7048d5b0c548402e7b2039c8dc863d370a1deb39c8ff64c
font_01_sfnt_off00012869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12869 10680 bytes
SHA-256: 4e8a98b9d55ddb516a78fd6f1ae0a27ca89ef266ae01389a4ec0bdec85ddd857
font_02_sfnt_off000140d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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