Malicious PDF — malware analysis report

Static analysis result for SHA-256 0177aede85aa338a…

MALICIOUS

PDF

81.6 KB Created: 2021-09-03 10:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cd5ed26814f98c5a9b3122e2b975738b SHA-1: 740f7b2b772f833f3debbaee3e61115e8b30d0c2 SHA-256: 0177aede85aa338ab4b758f892cfb056f1f1309b4d7cd47dd9b4aae1eaa3197c
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it's part of a phishing or malware distribution campaign. The presence of multiple links to WordPress upload directories and disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/a738c046b84614582e796aa8cd771fe8/27005670850.pdf In PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7f1ffba5f771e93996aa1b7cbd67a911/takifalujopofuro.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef65257509---bepiviselameduxipunoto.pdfIn PDF document text
    • http://ccadl.com/files/20210831124540.pdfIn PDF document text
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210811_D57F3F9EB4DBBD8E.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/11423945ba25c8c225083d545f18d8a7/65396947754.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/31101871346.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/wotuno.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/7nktr4d5nm14daj90v2c3i7240/15575593324.pdfIn PDF document text
    • https://dietacud.eu/upload/file/texesemomikimotapevazevuz.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160e76bbb0f60c---rures.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3u332i0n9c900n641g1nl5vdkv/dazitefak.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160df57654c8e7---35637670968.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210628010612149.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a798cb1139f---32351568614.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/gategafokisusat.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/viximewerubidalonezivoxod.pdfIn PDF document text
    • http://glastergroup.ru/userfiles/file/zimabaxatizinarogun.pdfIn PDF document text
    • https://penal-garazh.ru/files/94070106773.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/88ae22a6a52b7caa4b97cd19cde9320c/35740279043.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/kotipitewelinewo.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/sinowifivapagaj.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/9262157816.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=examples+of+pneumatic+applications+pdfPDF 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_off0000d9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 10868 bytes
SHA-256: 554141d1673d40cd2dafe84d231e72d6991f6f70a5f18d002bd77b03ad50ad02
font_02_sfnt_off00010ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE7 18100 bytes
SHA-256: 1c742bcd66e66f1e030d16646f46cfebcec6f009da1c29c071af1471dc9b4da6

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