Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0af5ebb2f110be8…

MALICIOUS

PDF

80.5 KB Created: 2021-09-18 21:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3844cf77ec258c051f59af24dc6c9bdd SHA-1: d23361d327d1fa93b991805070dc37fbd3307a76 SHA-256: e0af5ebb2f110be81443c620b00310b1e6349b865a799fbe195d437dcec58706
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of JavaScript indicates an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://philabc.ru/uplcv?utm_term=apk+counter+strike+global+offensive PDF link annotation
    • http://blekinge.boj.se/uploads/userfiles/files/5073250644.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/78971375984.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/maratevuwan.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/28597109604.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109100155181641.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/bofal.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/81863306324.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/28178936016.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/17520697299.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/bapalukinukasuji.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613ceec789d3d---temudavoleje.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/87862886184.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79562909850.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/83148309723.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/jazonexezaxozowivoxopuba.pdfIn PDF document text
    • https://piphoto.tw/uploads/files/202109151816045987.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/nikoxolipasik.pdfIn PDF document text
    • http://charontrade.hu/data/file/90723000988.pdfIn PDF document text
    • https://afmiletisim.com/resimler/files/xejajatofunebugobosegoket.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/nugafoxuvilabuvaro.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/38031361638.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428f94cad05---4962286670.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/gawivizemupolanabe.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16142ac165a750---27475805604.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/57189913803.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/sufigepaludagumisulasojuj.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_off0000d4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 11036 bytes
SHA-256: 1eaf5c585bcd5c66a29a54eb4b79847c9fb1de38ca0b380a966fcab8ab96c462
font_01_sfnt_off0000ee7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10691 17548 bytes
SHA-256: 8992907dcb600dc0147ddd2285517fa800cc1757107b7ce91ef2e1c22daa13c3

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