Malicious PDF — malware analysis report

Static analysis result for SHA-256 2298f33e5a616aca…

MALICIOUS

PDF

79.1 KB Created: 2021-09-15 18:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 74289ab0f61fc3319cd14bcabbbd7ec2 SHA-1: 9945fa756a39426d83666e4333050a896450b4de SHA-256: 2298f33e5a616acad816902c30f92b8a1577d0e831794aac1847e3106f674404
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, acting as a link farm to distribute content related to 'among us imposter hack download android'. The presence of these links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4fd439a00---36652728007.pdf In PDF document text
    • http://vom-ragnaroek.de/uploads/file/47939134422.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/7d9a0430f917cfabb924cff17d25572b/jogosifafo.pdfIn PDF document text
    • http://homeopathyhk.com/files/1206761887.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/7336902398.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/66475286968.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/21683041285.pdfIn PDF document text
    • http://aqcorth.specialty-match.com/upload/files/51994022257.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613461f1943f2---97455851560.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/56638561052.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/wamikope.pdfIn PDF document text
    • http://rockbond-aac.com/id-admin/fckImages/file/25533773980.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/patogewim.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/i06sj7flifjihb384qovnirnqo/83970119383.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132fdc460739---bemibosit.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/25360471891.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/33340335108.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/12127921397.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/642020b786b9deba9e3e854754c3167c/4564431547.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/3921034617.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-11/20210911111919754964.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0698899001630686337.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/31628485140.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/20407347921.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/55032267289.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=among+us+imposter+hack+download+androidPDF 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_off0000cf38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF38 11220 bytes
SHA-256: c00a4b580b58e9a6e82dd06e4c8a57fd79336c40580565da7208c83e142f36d3
font_01_sfnt_off0000e930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE930 17512 bytes
SHA-256: 21ffc71a8ff31c10b2fbaf99082b3d385ffc8324528c91fc0cc1b18f4b797c54
font_02_sfnt_off000116af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1