Malicious PDF — malware analysis report

Static analysis result for SHA-256 eca1cf5273822036…

MALICIOUS

PDF

83.4 KB Created: 2021-09-22 09:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9ed49c4b9aacdd28fe0d5b179042d47d SHA-1: 59fb933ca3a056f6fb9fdfa892e6b943b7ca44ee SHA-256: eca1cf5273822036e58cf63fcde766cadc118fd279fa78a2c83fed37541b4ac8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains embedded URLs and exhibits characteristics of a ClickFix social engineering attack, instructing the user to execute commands. The presence of numerous external URLs suggests an attempt to redirect the user to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://wastran.ru/uplcv?utm_term=run+and+gun+games+pc PDF link annotation
    • https://apoiotelecom.com/imagens/img_fckeditor/file/2323027506.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/77942687460.pdfIn PDF document text
    • https://simorgh.it/uploads/file/18682220718.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/8730704659.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/98684081914.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/toburazurifil.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/fogurazunepitirofama.pdfIn PDF document text
    • http://www.mostex.sk/files/articles/file/garitunazet.pdfIn PDF document text
    • http://szwygs.com/upload/dagefarovolaxiburewe.pdfIn PDF document text
    • https://worldpigment.com/image/upload/File/xiriraw.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/gofarutoletomarofuvizuren.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/lupefojabexad.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210907151641.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/pakugomavekojajef.pdfIn PDF document text
    • https://pasarantogel.com/contents/files/pitesano.pdfIn PDF document text
    • http://fteq.ru/files/file/xadinefakobanux.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/labajule.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/42605907933.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/95715750240.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/69637269342.pdfIn PDF document text
    • http://www.andreapondika.cz/file/relaganewebugupuduzefok.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gixaruw.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/89094165297.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_off0000e0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF900 10544 bytes
SHA-256: b2ab082acca126ae1f7ac634001cb86a55a4ebdd5dcb936a145e6960e1501dc6
font_02_sfnt_off000110c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C8 17984 bytes
SHA-256: d5bc9e6636ea86985ad58bb106282c71b8ef8101631d3705c054f1c0e1e08ec3

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