Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c30cc3aea0b15f6…

MALICIOUS

PDF

68.8 KB Created: 2021-09-14 05:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 67482fc31335962f6afccf8336bc51be SHA-1: 6228d47267f04fc18d6835cf2e321be160eb5455 SHA-256: 2c30cc3aea0b15f614dde6157e0ee365357dc5ccba106830e740ece298523783
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous URLs were extracted, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://huntic.ru/uplcv?utm_term=download+thoptv+android PDF link annotation
    • https://bomando.bomsolar.com/uploadfiles/files/taminijamesegutagibozino.pdfIn PDF document text
    • https://kopari.hu/files/file/kokojirufo.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/43741409205.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/70533238543.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139c642bdb7f---96478342923.pdfIn PDF document text
    • http://studiocastigli.eu/userfiles/files/jidas.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/44415595734.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/polodawomivetoduzesumadun.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/53394181392.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/zikapadokuvoturutawuxi.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/jusutimofixezoriko.pdfIn PDF document text
    • http://rubensova16.cz/files/file/42603934007.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/kimezugimu.pdfIn PDF document text
    • https://tmtteks.com/files/52190503180.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136f9e267eeb---77683573212.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/99998386206.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/zosajimelaje.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/80373597723.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/ximelolalawopagojidaja.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/7433507695.pdfIn PDF document text
    • http://only-svet.ru/upload/files/mudiragegudejabulumino.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-9/20210909013855858775.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/tubifegelim.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134891bc9e1f---giletipekifabe.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_off0000b32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3F 14156 bytes
SHA-256: 0b345a46cb98f6e1f2ed103f8a5375a88743c6102cb9808e20f0dc1a3ad64177
font_02_sfnt_off0000ee91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE91 10340 bytes
SHA-256: 0446a346bfccd47e1b69db9a35452e6931b337aea6fba5b3f3da075762ded5b1

Open this report in the interactive analyzer, or submit your own file for analysis.