Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d97759fd780a457…

MALICIOUS

PDF

83.1 KB Created: 2021-09-10 03:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d686807b54907624f8d4b10f6c270da4 SHA-1: eb930e9ab9dd5d00005fcb70047dc7652b5fa740 SHA-256: 9d97759fd780a457075e686e86ed0211ecc2f75aad27f623cc3c37523616d1a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous external URIs and link farm patterns, suggesting an intent to redirect users to compromised websites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • 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://inwebjor.ru/uplcv?utm_term=vishwatma+1992+full+movie+hd+720p+download PDF link annotation
    • https://serrechevalier-skifun.com/imagesfile/19655604959.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/ropizuniputumorozoka.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/zevizideruf.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/lobuwututis.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/40807128315.pdfIn PDF document text
    • http://krakowska98.com/zdjecia/fck/file/75326018315.pdfIn PDF document text
    • https://jills.reviewz.eu/app/webroot/files/userfiles/files/tewemenepudebagebob.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161331a65b3ff4---pawabutuxakigorobopabi.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/48416476926.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/7c9bff0db15e241f893fb41a50854c80/zifid.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210906080653980.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/31329131316.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/nerawof.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/60932132708.pdfIn PDF document text
    • http://tataservice.it/userfiles/file/74078148688.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/66038977816.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/makejim.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/pogemexofepepu.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/3e9dcbba69754efd64be6130b38b7fad/9641922940.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/damusuxajebimegar.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/161315a4363549---82914618660.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/52685840580.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/uj18c273kugihilmp5ljjibtkj/zufevepam.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/xotena.pdfIn PDF document text
    • https://eniedu.com/data/file/20210907174548.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/d745424b88fbd49e64f495b2f2147e33/saxegufivibebalegejinu.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_off0000dd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 11396 bytes
SHA-256: b8ca77afa2e636ce4c2fe4acf9386c71e3cc0cf817fea9eda653c716bbcdc9a5
font_02_sfnt_off0001109e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109E 17544 bytes
SHA-256: 79790f86298442d42cf554a8243e1e9b0214881504b23af72c704ae6e85cae48

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