Malicious PDF — malware analysis report

Static analysis result for SHA-256 360bfcf3d6a50f88…

MALICIOUS

PDF

80.4 KB Created: 2021-09-07 03:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3753f008539b5623507fcbaadc9a4ea3 SHA-1: 5a53a6bbc5ce3b991a5588a0b75888dde73547d1 SHA-256: 360bfcf3d6a50f885895171b5187be8b9644bfe7eea6c8c91169028f0f60ba45
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The heuristics reveal it functions as a link farm, directing users to numerous external websites, many hosted on compromised CMS platforms or disposable domains. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it is designed to exploit vulnerabilities or deliver malicious content upon user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8014

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://irlanc.ru/uplcv?utm_term=lined+paper+print+pdf PDF link annotation
    • https://calienglish.com/ckfinder/images_store/files/zamuwupupa.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/domeg082mn64im594nvqlof391/97222973977.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609642c5878de---kimusezigipapolu.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/36b42b333a64698d7373a87f4efa4100/boxunolazapi.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16070dd382ac35---19119559893.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/pupozuxi.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/99728873c2268184d752f267d38d1966/94908835615.pdfIn PDF document text
    • https://www.htlexpress.com/ckfinder/userfiles/files/mipiwemarexi.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/50gtbp78192vj1ohthr85himp0/92635906652.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/fisoki.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/57668755471.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/vf22kjsj29et1qrk5hjtkbmppa/38180768320.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8afd317183---buzajijetawozopejad.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/93b591b7ae20a064b5232e8d47ff9f3e/mebijipinota.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/judorakonefewi.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085990627006---93267325939.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98e18719b---sibivadusuroma.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dce7378c66---zukavolanofosorikumubazi.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/faguzukerefetixufibije.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/zesar.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/fixebapikoneru.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/45d8777ab9d35247928438d7a4940c26/89316653246.pdfIn PDF document text
    • http://cristalensi.com/public/File/soxabobetevizemo.pdfIn 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_off0000e11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11F 10116 bytes
SHA-256: d625135c11c06bf9c4662b423954f1f14ae66498210591ecbea1713e5fb55b06
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 17116 bytes
SHA-256: 3fc531553fab624de1a3cb18a7e67b62345b206a4d862a8cca9d057f577c6676
font_02_sfnt_off000123ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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