Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4ce1400eea989a…

MALICIOUS

PDF

89.6 KB Created: 2021-09-04 13:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 16f0724890093b23c068b083167cb851 SHA-1: 1fd9185589a87205066cce529d58d1bc84bc5426 SHA-256: ba4ce1400eea989a1274f25a883c21c4172463002da9245e8b7bab43d623a5c2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The presence of ClamAV detection and ML classifier flagging strongly suggests malicious intent, likely phishing or malware distribution. The file's structure and link farm nature align with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pistant.ru/uplcv?utm_term=head+first+java+latest+edition+2019+pdf PDF link annotation
    • https://thefertilizergranulator.com/d/files/pejexojuxerevazi.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/romadanaguwenivamoxoxaku.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a06b1cc9f22---fuzusotosatu.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/25391786349.pdfIn PDF document text
    • https://tsegypt.com/file/bajizoz.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/fu4rt6k1gkahjtob29ktaf7145/53866409904.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f42d7908d0---31725066005.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/98446341516.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/popoju.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/mojuxosi.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/470374rmlpee2q0rm9uf64kd42/zojilenimobototumunaromo.pdfIn PDF document text
    • http://panteres.com/files/files/legofaninexevapenenogi.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ada7f5ed3d---65888459388.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/32089643104.pdfIn PDF document text
    • http://www.psyforyou.nl/upload/fckeditor/file/vagozagafafusiveledob.pdfIn PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/69454761348.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/16681639545.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/r94qk7hsll9kere9l2macedgc8/domexozez.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210718020634.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607465c49b4ac---wowulozomoput.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/20628210702.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2fd0937ac---sonuwikugibu.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/63112469138.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608ede6c228b6---35706999970.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc853f0ecb---67926052691.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_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0A 11140 bytes
SHA-256: 32ad6958578f4626eb0f2244a3f86b546f6de8330c47bd360b3916454757b27c
font_02_sfnt_off00012823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12823 18728 bytes
SHA-256: 63118a8e09b2206235b41461ef52988f242d273eae35b6dfc308136bec8fd19e

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