Malicious PDF — malware analysis report

Static analysis result for SHA-256 f12f00180e0d686a…

MALICIOUS

PDF

85.2 KB Created: 2021-06-30 03:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ad9cced9247cf05eabe9faee522f9ce SHA-1: 5c60885661ec20adf1ba9096d2ac510bbefeb019 SHA-256: f12f00180e0d686a5b4cfb16dafb132bd5782ff7a7263e11f53285fb39e1b7ce
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised or disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and link farms strongly supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://jfhconsultancy.nl/userfiles/files/xoposozelewabisu.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/qj62lcu0p6js3h23uel7e3fsvg/75371923080.pdf
    • https://binarbaidequipment.com/public_html/userfiles/file/zosufu.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16070bb577a766---60012466927.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/d6ggn6erjbni2a5g9grvkkr21a/kovabibad.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/f5614dd072fcb84e11ab3f3c15d450e7/57991453774.pdf
    • https://bbgpiti.com/userfiles/files/87996998928.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607edcf613da6---71911820374.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30e443a6fb---24064693247.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd72613946d---xuzegozivepofima.pdf
    • http://ketoanantamhcm.com/uploads/files/dapenozavefakopawajajetar.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609484b9d514c---34313257945.pdf
    • http://hanhthien.net/uploads/file/kidunanegolovenovopilize.pdf
    • https://zlato-eu.cz/upload/files/74919548777.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b653301568e---85646203403.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce5524b110---86288365173.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16073cda235f7f---jasufisapil.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e1726f5ef74c3f0bbc5e9806924ed9b0/fuvitejifukedelu.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/6301c7c965ebe33c42de97e41f9874c7/88413643177.pdf
    • http://furniture83.com/upload/files/57354371435.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16077391a1e344---nitujor.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/6cac5c8fe607b37c74df823da01287ae/54655019464.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=mutual+fund+prices+today
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1d.bin
d6f21593a45f3c17f5cb99b4590ce4ec2961518d1f6d70b18310d745332956df
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 10820 bytes
font_01_sfnt_off00010335.bin
7cf94b54752f7ffdfe2f659f42d0060b01d931a95b5da7150187532469556eba
pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 17132 bytes
font_02_sfnt_off00012fe7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE7 16792 bytes