Malicious PDF — malware analysis report

Static analysis result for SHA-256 17904fb246ea2fee…

MALICIOUS

PDF

88.3 KB Created: 2021-07-13 23:56:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e6a7eb4b92275e9c47e9bc0d1cb3971e SHA-1: 5f1f360e274aea18994ab6382af15529ee38f130 SHA-256: 17904fb246ea2fee8879bd0ca99ff7e7aa83c1e961b6c51cb71c5c5fe8533383
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that redirect to various websites, many of which are hosted on compromised WordPress installations or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or scamming purposes. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://queure.ru/uplcv?utm_term=the+price+you+pay+for+dating+a+narcissist PDF link annotation
    • http://diakmelo.hu/ckfinder/userfiles/files/fogokoronasuwajekudubagi.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/5d4187705716e860c650204ef909ba49/17529746656.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/lesolajezoboratitox.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/c756c606a90f082128b45ce74fcab042/lirukilanu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/39351979316.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/t59lmd7or265ibnh8ljah8os05/migiwizometebuv.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b618beb4c---kenugubutosopamapep.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/e3b793fe2e7d40c7c4042a920eb6c2fd/rarofimurofunalawen.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/47696086789.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/ce00b63f1bd81304653f53191d1da921/pivobusutavevugazoxazor.pdfIn PDF document text
    • http://zzliuxue.com/upfile/file///sovewakive.pdfIn PDF document text
    • http://zuche0551.com/upload/file/13493605828.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/2986655448.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/memex.pdfIn PDF document text
    • http://amtutoring.com/clients/865321/File/51082613957.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20215308531877.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1bfdab148069d8de5ea87cca858dcb49/8898432542.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3ea85955c---wenixosu.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/12453466496.pdfIn PDF document text
    • http://iphysiology.ru/upload/duweposasulirojulanipeja.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/papogajew.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075511e86321---peminumanokebebudorom.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce57359411---lasileliz.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_off0000f4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BD 17484 bytes
SHA-256: 5410042dc114391e658d538e281768d3f4b9a14282432dec68d7b0935158d155
font_01_sfnt_off0001226e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A85 11028 bytes
SHA-256: ce31a75d0d42692af08c3c3420e57df62f6cc381270818df1badd35e4b48019d

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