Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e222d047ccc563…

MALICIOUS

PDF

81.8 KB Created: 2021-09-17 14:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 42305300f7cee80ae5650ef0250ed0ee SHA-1: 31d397379764ac85d21861c8b16a92e04f5db2bf SHA-256: b1e222d047ccc563f8a1153a75be0ea00aec9f2695a22f62d266c685f46094fb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://huntic.ru/uplcv?utm_term=andy+murray+live+stream+free PDF link annotation
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/sumodugexanobomakufemi.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/56036711687.pdfIn PDF document text
    • https://5udua.com/contents/files/7979327585.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-9///20219171659555416.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/mowobuwarap.pdfIn PDF document text
    • http://becucci.it/userfiles/files/fitenitamuduj.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7a23ec548---gekaxajidovoxa.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/j1docsqhqq9ihv9e7e2ugui1bd/jiwalejaxididepupubu.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/73511718085.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/feluzukajibikolufete.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/nerixosutezivizaminotelod.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210902_113634.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/fdd59295e41f41d525c1c437bd2c8d02/12423477281.pdfIn PDF document text
    • https://srinivasagroup.com/ci/userfiles/files/pukok.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/begax.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/zemalobaseruv.pdfIn PDF document text
    • http://kbfrutos.sk/images/_file/gijadivakipewosile.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/99273090103.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/fihkml0eahrggqiu3dtpedqhi2/54293944705.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/bunefenu.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/dexenevamolap.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613909b340074---51914647554.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f244b2cdf6---wivivonumasidisuviz.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_off0000dbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE1 17512 bytes
SHA-256: eb55496546f35ce2777d5c45382fb83c3d900912cacd80c7b341bc53a0edc08f
font_01_sfnt_off00010970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10970 10656 bytes
SHA-256: 98180544576f64e15dc308c3478d21c94e0f2fcc65753452701d8547114897c9
font_02_sfnt_off000121d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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