Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eda01116e04a548…

MALICIOUS

PDF

76.1 KB Created: 2021-09-17 03:52:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c47c55fd43a1e9264e429fb82a42c1f2 SHA-1: df4e6c992f78ae624fc7914f10bb0cf1775d2dc0 SHA-256: 2eda01116e04a54840bf6fd6633dac88a62502cfb663c90d0189cb9d859cb02a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting an attempt to manipulate search engine results or distribute malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an intent to redirect users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3072

Heuristics 5

  • 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
  • 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://majedalkarkhi.com/pics/file/28999973949.pdf In PDF document text
    • https://gangnampools.com/contents/files/66477447031.pdfIn PDF document text
    • http://rayanchem.com/d/files/29703077342.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/2a3k6olts0hvanpoks6ik27677/80285933774.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/98021714828.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/87776755192.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/tafelefujixifejufiki.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/fogebutegagebasumunutejos.pdfIn PDF document text
    • https://phukienbep.net/media/files/1487005544.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/21207361957.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/60735329433.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/19188031929.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16133d2366d5dd---milavetarejajaj.pdfIn PDF document text
    • http://vuonlan.vn/data/upload/files/tupufosabe.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/93682069211.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109021808174916.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109032126301602.pdfIn PDF document text
    • http://e5tbr.alruaa.com/ckeditor-ckfinder-integration/uploads/files/47946877312.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/869b3b82235d4265741b85b023863310/molat.pdfIn PDF document text
    • http://2018.letnifestiwal.pl/ckfinder/userfiles/files/39525820268.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/68878679535.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/befugikupijeromewowimo.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bab23745c6---kugesibufaxaradevineli.pdfIn PDF document text
    • http://cecev.com/stockages/files/91067483465.pdfIn PDF document text
    • http://exima.kr/userData/board/file/69372859166.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d83567cee---lulizesen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=age+of+empires+game+for+androidPDF link annotation
    • 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_off0000c8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 22576 bytes
SHA-256: 8c98a4977f261150fa55d9a2638eb1bf3d72c6e590eefb1954259796a8915334
font_02_sfnt_off000119f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F0 10676 bytes
SHA-256: d13656768aaedb2114f468a296120af53de2d19d0b482d48c91a2109e0b024d3