Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18052c6700b18a1…

MALICIOUS

PDF

83.3 KB Created: 2021-09-08 01:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f8bb9fcfa51ae90522e9c4749e2f8786 SHA-1: 92734a04abe40a003398b6fe6e56964eb5d4a722 SHA-256: d18052c6700b18a14c81b6428361056cdfcbb7b3a48fd38a2427763c7e578b1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, 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 delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://parvazyab.com/basefile/api203/files/10362811810.pdf In PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/aa66769d0c85331e94f6bc21487e29be/nopej.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/gixutuxog.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/22932653001.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/94167785957.pdfIn PDF document text
    • https://davnosti.ru/upload/53680095243.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/jajaxerusap.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/lugetetukegojofonola.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/62fced9e45e4a476d855b9c6dc1fbc42/78973625135.pdfIn PDF document text
    • http://carszana.com/image/upload/File/56946887074.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867a5f5a32a---desuru.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/dibelabesabazovenurofi.pdfIn PDF document text
    • http://someteme.com/archivos/_20210704232953.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-8-13/20210813042533486031.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/5edd7de24041e3e4810d16bef7076495/godupivarerikebedefumofow.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/9443b37e5344452b1be7b8720329d7fa/54378504721.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161359da92a31b---kajip.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/00b871ff2f9fec5c92ad8338cfaf5d9a/94004518026.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/ptmrfj0br6e81d145vvgv2ecbt/1026757830.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vmc3qhf9i2qfbos4rlqmo56179/pifewagiwez.pdfIn PDF document text
    • http://scantech3d.com/files/52133812100.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/33358327649.pdfIn PDF document text
    • http://ruresept.ru/files/file/68469349355.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/7cf548db2a532bbae27dde1346048b85/wimotiperiput.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/67994940643.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/89340211625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=kitchenaid+khb2351cu+3-speed+hand+blender+manualPDF 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_off0000dfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD9 17124 bytes
SHA-256: c2f0131ce143063ca4c2ab6ccd45133571c3304081fea28f6fd8161256c7d118
font_01_sfnt_off00010bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12410 11496 bytes
SHA-256: 2a1f4819fd760d6fdeb42e9d57c705bcf9fb0f7f021c06ac365276e55802b75c

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