Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf5dcfea79afa80…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 17:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d38ac7b784c71eb16fd464b739f6b795 SHA-1: 0be1db230d7fcc8c2a0adc80d025831ebc22d651 SHA-256: eaf5dcfea79afa8041bbc147f61e11ebb007c88c01ea48c91778395362c19b9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The file's structure and embedded content indicate it is designed to redirect users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://smidgel.ru/uplcv?utm_term=moluskum+kontagiosum+adalah+pdf PDF link annotation
    • https://alharithiforcameras.com/ckfinder/userfiles/files/35128762032.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/68f39b0e24df82c211dd5cfe81aed88b/29921524736.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/36034566738.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/jarudisuduririkusuvire.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/59574184126.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b74af3393---38676817069.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16086f2fcde236---788030230.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/esfhtn19ol30791c4cfs33lgut/11696985204.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/furovigudafuguti.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210808130116.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/2i9vh5nk9p3lpg0o2btpsbbo9v/mowilaraxuzawoj.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/h52e26u7rlck690983tjqoclg0/befagofofakaseseze.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/74053423173.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb4991de6b---sodobunilufaboralupijojo.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/ligobipodilijelofagovamo.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/28647830220.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/xexegolalukanezikof.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/mejatuvewolafi.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103a1c788ef2---viselemiselum.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/tenumabupadesit.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a13e83a42---tufokitawimogiwiguf.pdfIn PDF document text
    • http://balone.net/_upload/file///rorisexekuvumudamawaxiw.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/mibupozedujijafunir.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_off0000d703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD703 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF15 17524 bytes
SHA-256: fac9005b981c7ed3a7b80deed83645ac28e51dc41d47622bf3617985571af460
font_02_sfnt_off00011cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD3 10900 bytes
SHA-256: 810f0d81d66d7dc3e1e63929819cf29ec17fd96f9657eefbebd28ea9eb2f030e

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