Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13becbadd495c74…

MALICIOUS

PDF

73.7 KB Created: 2021-09-13 03:13:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dfd5d12c6c775604a5a73f962b70efbc SHA-1: c1322d4b50c2e118d4cdc51fa7121f16e2d6f8a3 SHA-256: e13becbadd495c74227a0a5e14114a6b9e197b9ed282333da5cdbc8e11d8270f
176 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis revealed numerous external URIs, many pointing to domains flagged as compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of a raw IP address in one of the URIs further suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://shopabrang.com/images/files/46759418334.pdf In PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abfd698286---46341380326.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/rewakodoriraf.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/panetizewugatep.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/caf0560a8fc4451154a91422ab8efeb9/32806748225.pdfIn PDF document text
    • https://kildevangen.dk/files/88126039490.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/riraxuvexub.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/mujuwagomovotepanofovoj.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/50744674551.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210907195122466.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161387c347b89e---76420483989.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/54246140464.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/50265813207.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/kepiragidaforobakozulun.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/54574294789.pdfIn PDF document text
    • http://na3.it/misc/file/bokenemafid.pdfIn PDF document text
    • https://artedelvalle.cl/gal/files/file/kexorinujetagowigetisez.pdfIn PDF document text
    • http://xhzhengli.com/upload/36382151183.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/selujinowuvixibagoj.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/mirige.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/73882579700.pdfIn PDF document text
    • https://limsurdua.com/contents/files/ludamodukunebo.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/juzinusujodinadubekoma.pdfIn PDF document text
    • https://tennis-samara.ru/img/file/7031779994.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/luwosozoj.pdfPDF link annotation
    • https://bednidhitraders.com/userfiles/file/57117717471.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/47459020420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=social+studies+textbook+for+jss2+pdfPDF 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_off0000bc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD421 11268 bytes
SHA-256: c7203ab6858cdaf9f75a27d2c436aa9076c3a8bd68ec40a08f2ea56342fde0ed
font_02_sfnt_off0000ee84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE84 16612 bytes
SHA-256: 619739ab920ae4f18d457dfd960e02afa2b65ad5f3f1ee26f10a335ae65dda1f

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