Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8148c73d57620d…

MALICIOUS

PDF

76.7 KB Created: 2021-05-02 09:35:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: aad4a8c8e77de3c7d7e0280d217075d7 SHA-1: c723af471c35e7d75497fea72434d2dff5a20c30 SHA-256: ff8148c73d57620da2fe5fc20757fb7ebec005b141ce45f7eb3bfc8f1770deb5
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The file contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links and the overall structure indicate an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea6c93d34a---34996696199.pdf In PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/ef11238aee3d87abd59bb31cae6b6454/midovarokalupexixo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d26492e8a6---vogazasopusoro.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc7ff4209b---21865131475.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/oe9jgb74io16bar4e8stj7meot/bavuzexujenalerik.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/43136104536.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/193d9d03bed6d00c64f6c6bff3f5e600/3876502934.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16075489f0e211---zuvurarevumizomezi.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a3cbdb57b---6541213476.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c83731649c---88432802998.pdfIn PDF document text
    • https://hanul-muresenilor.com/wp-content/plugins/super-forms/uploads/php/files/238hctom0j60ur6diip905p6nq/49315421551.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/kpd7q3l6dbqcq13q7fferc2s7s/73813822552.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16079e0ddcee42---71479925602.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/9afafdde9e1339648791c8d36704ede4/xevol.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c77b72f41a---jodesuzewidunevibukipez.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871b3eb4169---serokogixokebuwivogire.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160845b1c06491---razazazi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=new+amharic+music+video+sPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35B 4964 bytes
SHA-256: 3ab9c6c84bd95c50a1fe289af76bf76bdd3b6f2c6f1bff0c5811862047f07546
font_01_sfnt_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 10772 bytes
SHA-256: 9c09fd57fc7e87c160eb832daf1e2b7751e792a53b5323a0a619ccec4c9d6623
font_02_sfnt_off000117aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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