Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd7a6f27970f8f4…

MALICIOUS

PDF

83.5 KB Created: 2021-09-02 04:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2cedba210bbfa1929faa9b21b8409c13 SHA-1: 976e8f4048c85ad3f2749ef1558da401fea51bbd SHA-256: 1fd7a6f27970f8f47ba061952ff9a6acbc29ec3c87e2abba0ffec6301bdda02e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8d2004c08---74965810023.pdf In PDF document text
    • https://korankertas.com/contents/files/pezop.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33435848546.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/a8d50f57ffe8b503bc2390ab995ee955/pexelaker.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/7247283183.pdfIn PDF document text
    • https://masihpt1.com/contents//files/78136728821.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/cc6541cda9bc4f8c5a2dbf268dc1b017/rogoxuziwilozofos.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/f90a6365c752d7040e4e63d9f3f643e5/xavefedoseva.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/vozudupulogafawaroneku.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160cf369e6904f---46346681688.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/dugifazuju.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/04q1jbcsroharrkuaknof8h2l3/53598960070.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/tibisuferaporisemitoror.pdfIn PDF document text
    • http://artospace.com/pics/file/kojefolovamiro.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/22591690446.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/49493795380.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/jisatikapigizumipaf.pdfIn PDF document text
    • https://coil.hk/upload/files/77456905661.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8741b6ae8---20334739167.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609951516b23b---11453580535.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/kupufurepupopowuru.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/tunibewuw.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/968jupcuk2hfi1aio7v7kofed0/doliruxine.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+meaning+of+humanityPDF 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_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 10524 bytes
SHA-256: 1118ba474c4881b9be9cb457a44365a11d0da70fdb3734c5db13b7119003c0dd
font_01_sfnt_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 17416 bytes
SHA-256: 36fa23c267cc9571b5be364a7a43fb4039bcece766e84eb65efb1bb291cf3162
font_02_sfnt_off000127f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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