Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd63c954e934828e…

MALICIOUS

PDF

86.6 KB Created: 2021-07-09 20:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5b9c116149730b2315406088ba4d01f9 SHA-1: 1ccd0df6509bad79044d857f43024481613849ce SHA-256: cd63c954e934828ef415513d36da139f178f5eb7451e2767504597c57f573eae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are indicative of a link farm used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=toy+shop+oxford+street PDF link annotation
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/l859u2avee40oac557l2pd8n8r/bukesor.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/75360c2fda01e14d32ef37f72aee830e/37514660393.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608755c76459c---7551633668.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078b34160477---vojirawigonivazalitedori.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/20850221561.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/40aa775436ce51f407c9fd909862b478/wuvopenometepitagemoxige.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/68m6c7iplrhg28thbu56oq5iio/werofawazikazeganojoku.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/qo1esp2doctkdrrub6gjlagk7s/fafidaf.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/zeranufusiwigoxelum.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ce6fa2bd9---lasinivixifanutazibuxiz.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061716024468.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/padikabefotafebo.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9946de9fa---50601717949.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c1d4562fb---61784431615.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/46099fca70abd93da48c5765ef55fe99/rojorujibevezevotufuviw.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/48295106973.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87c9f00da---55841369011.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/1110a53c587dfa752800224bdb347111/17855066187.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f365e54d3c---bibevezifaxa.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/23768520416.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/kumarugasegerirerapobuveb.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929592ccb4a---pudojuxopara.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/dc412f427d81308ed938a39dfcf6ca9d/xesasewadozevirusabawij.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/6821590319.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bb49f2e334b---54723445942.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_off0000e8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EC 20732 bytes
SHA-256: 520484abaad9488ae558e4fbd79ba691eacd29532ecfe588b60574e59ec23b7a
font_01_sfnt_off00011d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001358f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358F 10372 bytes
SHA-256: f4f910104e187f80ed278675036e1f9fc76adffe54466c459c1a53968075ada1