Malicious PDF — malware analysis report

Static analysis result for SHA-256 061804d264f01884…

MALICIOUS

PDF

91.1 KB Created: 2021-07-31 01:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 66873069112f961e1c8d66b4bb68f41f SHA-1: c9cac55fa8d163f8e53c62c4c6668260e921c9be SHA-256: 061804d264f01884a409db648dedd538d9a25061e10979a9b382f85292d2c915
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, which is a common technique for executing malicious code. It also contains numerous external URIs and link farms pointing to compromised websites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=how+to+get+free+coins+on+moviestarplanet+2 PDF link annotation
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c929ea99f40---53721775553.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a818a2c3bd2---67654041558.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202161811633.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/spjm3fhdfbplgik0spk40er0ob/forutive.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/17211612798.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd60de2955---73094619432.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/20517124347.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/xuvoniwe.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/57521335554.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/vumujagidapapodenetijupeg.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/4pgai6re0e18rpp763an4tlps5/8974713760.pdfIn PDF document text
    • https://aromamarketing.md/img/files/vorumowadudojexexagoxi.pdfIn PDF document text
    • http://orlickachata.cz/files/files/65874718732.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3978c2eab7---gogokudolejuxunune.pdfIn PDF document text
    • http://teakdeck.pl/files/file/sigolixesadumetarepak.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/fatuvetaxi.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/75685606114.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0c36cd229---monujubilanuxagunimijub.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/15653747355.pdfIn PDF document text
    • https://menu2uplus.com/images/file/davex.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/92374827984.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/80734813304.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_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001185b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185B 11088 bytes
SHA-256: e699b55dc48f34d47c6d880ce5e8730da2b004705c8a31e2262586b46ebc4340
font_02_sfnt_off00013244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13244 16780 bytes
SHA-256: 665aa4368542e6c45bfbd0937925d9803b8468071c5525e87ea5634606faf92d

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