Malicious PDF — malware analysis report

Static analysis result for SHA-256 60318162a5453851…

MALICIOUS

PDF

119.8 KB Created: 2021-06-18 10:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f7f6d58f146ef153b7f1919b4c41dc8 SHA-1: 4c1ad1127859d6683f52e3a58dae8ecff1bfdbe2 SHA-256: 60318162a54538513358dd4001b637d7a43564b3ff4857ffa6309a13ff21352f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and the nature of the links indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://queure.ru/uplcv?utm_term=the+legend+of+the+blue+sea+episode+1+eng+sub
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b159ed3f52---74044628822.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/sadivanadukojifavame.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/677ktq45j8q36njtjr5lubro1c/65035450933.pdf
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/81141028911.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b8bdc11d4---tajisudixapetoxovejer.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b8b08da96---koseverafomuzabetorivu.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088989c6dc4f---44063001546.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e255ae4762---4073601979.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/lhiu71hub18l05r4dijs343kgi/34557073117.pdf
    • http://sushiloverca.com/uploads/files/59277335592.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607161fde7433---jebilekofaluvivuruxeki.pdf
    • http://acpiindia.com/userfiles/file/kazoliguboxatunobupo.pdf
    • http://aweibel.com/Photo/file/morenegibopimelekisube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001b4e1.bin
dbe4fe8288a222026232df5b2edd89485911929661c0207b28a7b42ea73c1ac5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1B4E1 17812 bytes
font_00_sfnt_off000132e1.bin
0e41950996567da649cb2acdfc92d1835a12ef7f720b1fd220de9c03e5ff70b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E1 23908 bytes
font_01_sfnt_off0001786e.bin
608c38f9c07889b042f55771504ef007f58b28b23b88bff662bcf309d2deec73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1786E 5348 bytes
font_02_sfnt_off00018aa4.bin
d1728759a104dc3e1f9109fa690bb38cebc498bc713adece14a17dab070cab75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA4 13196 bytes

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