Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e7048ba50cb13e…

MALICIOUS

PDF

78.8 KB Created: 2021-09-03 05:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: af11d26f52d6307c405218f6806aa5e1 SHA-1: f05de2c4d84d5b0c41a540b1db8d74295075d1d8 SHA-256: f9e7048ba50cb13e875efdebfe2d69da478a6706a2083d472c68ba9156a40aed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into phishing scams or download further malware. The presence of embedded URLs and the nature of the link farm suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/ece7366943d27ab11a29fdfd17c03606/93514159824.pdf In PDF document text
    • http://ustunongel.com/image/files/76953796734.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/labalemuronab.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/ravarivufof.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210714162623559221.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/0bd896ad6845ec2c9975cbfc33a0574a/14717867572.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/eg87158vjk3mkstr3h06me59r0/31407945164.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8eredo658hcb1qi1h3ilegbjl1/1486150315.pdfIn PDF document text
    • http://yalciniskele.com/imgup/file/23462126653.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829b155f025---84641838308.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ab7961dad---53713431775.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/45506573680.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109cfacb3072---17263381833.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/5044839669.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fff2456afc---21878842293.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/valefivexumazukuvoga.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/lovetido.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/sewagezifop.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/sifudumaneterixu.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/86659781736.pdfIn PDF document text
    • http://kd-council.com/upfile/files/74696494049.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/a39le2cm14gs266enf6ub76736/keluxejitisujaluguku.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb58c5b5be---72074536323.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=vietnam+gdp+2018+pdfPDF 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://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_off0000cd04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD04 10876 bytes
SHA-256: 8bdfe34bf85d58f4b09c136e17803ab3d9748d81c9a318a8400718ebe9512722
font_01_sfnt_off0000e60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1D 18508 bytes
SHA-256: b38eedd59b5682908abc4275f91bbd6834eef376256905396abe9e00adb49d42

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