Malicious PDF — malware analysis report

Static analysis result for SHA-256 27cf4e865bc662f4…

MALICIOUS

PDF

86.4 KB Created: 2021-09-04 01:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fb6a931d1835dd6fde0f7fcef26eaefa SHA-1: f3ebff76d9f03df44beba76c4a3e808705d08dc7 SHA-256: 27cf4e865bc662f4fb49478618a3c3f5a6631d204091daa1959886c95235f288
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and disposable domains. The primary purpose appears to be directing users to potentially malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://garglob.ru/uplcv?utm_term=speed+control+of+3+phase+induction+motor+pdf PDF link annotation
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e57dfa1530e6ed51037590631fb026f9/10967973993.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160908b1ee2000---30582919506.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hpogiraf5h8rtqnnl5boe31v87/48776628942.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202107060542065511.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/42552296931.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/cd4754a9262101f538ff7556b08173db/84024021022.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/76706643255.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/pokusepimakupevudoz.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/e62dbc6b68d6b20c3166d1baa14638f5/xotasufizotu.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/nawumoranoxomuvumabag.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/3045096231.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/qmggs821uvtrb1c997mptpfogj/27779879689.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2f9ecc36e---kanetukajumabu.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/viwibikukowinajewagavu.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/4b3f6e5dbcee871d96fa9a3fffb5b866/nikiluzi.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b6b668708bf4961bc8adf06c1b49fc5b/69084993526.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/atreab93o4s0sh0i0kd41rrql8/59945779738.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210527_78F3836B83F5FA18.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/97051842058.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075982d9630e---61158740601.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/zatovigo.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e4055f01b8c---wowitugilipovo.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161110a95414ec---20887197372.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/68148168502.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_off0000eca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 17496 bytes
SHA-256: 4ebaca36e5eac4bb490a6e65dc3947d0fd866d8adb0886b7811256db4706dad0
font_01_sfnt_off0001198c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198C 11232 bytes
SHA-256: d7d967ff805937079e6b69f8704af1667dda60a1156b69119347a5f75748a263
font_02_sfnt_off000133a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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