Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0b1dd6d8d3a0ff…

MALICIOUS

PDF

80.1 KB Created: 2021-07-20 02:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fafdb6a38abbefd322dcb3b512a16122 SHA-1: 9f62ea2d8eaf63976683a7833499a3d5f6d1bb49 SHA-256: 5b0b1dd6d8d3a0ff63fda39a7d9086dd42380f6ec37269c1a202d7044b59cf00
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these compromised hosts. No scripts were extracted, but the structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec4ad59445---14494808836.pdf In PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/2r8j80jt52f96h7t495fs3cgjh/nebuduvuxezozexi.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/ac2b5d0c64ff4fa018d9d05f5ff1b9f0/76719687789.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bde428728ca---wuwififujuvivafizaso.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/8d2664d2ad197ad128c559906d0de65b/42034451762.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/82jo9ij970efc6jmc9cf0vf4p4/61930486813.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607feef369d2d---56486250405.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/forexejara.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8ca711ec19---ledimezu.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/fevokuporalekeloxoli.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cfcbca292---sipuvufamegozilikofuj.pdfIn PDF document text
    • http://accronline.com/userfiles/file/sidedovo.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/nuwebejukewebato.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/47354176673.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/boxifaferodize.pdfIn PDF document text
    • http://normandyclassof79stl.com/clients/e/e1/e16d7b8530e96d8d426d6b963c92b0b5/File/kalunabeti.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/62078336114.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb182d4d83---resomegekuxavetokel.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/vuvekusukawuzejux.pdfIn PDF document text
    • http://yoron.net/up/files/56061107147.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/sojumokozokewagezoxijo.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/jarubajatafezoguj.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/39fade8b583312d8668758434cd55226/89719684670.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=can+you+make+chainmail+armor+in+minecraftPDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/jojumifolu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFD 10772 bytes
SHA-256: 069b4e2179b9c59f64f9c70afeeb8bb5e42b8caa4edae89b6f60bb6130f40427
font_02_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 17196 bytes
SHA-256: d3a872803d386b4ad9d723379e6055eaf3235246873e2374d15ba519aa34fb1b

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