Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7676a014c9a8ea…

MALICIOUS

PDF

77.9 KB Created: 2021-06-09 23:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bec321f8f2b606fd3fec6c06ac073307 SHA-1: 7cd1322c6f5bc2a8e1bd8dc6e2fb5a3d2628af4f SHA-256: 2d7676a014c9a8ead82096ab9f1d55208b414a2d6143f75c93289eca2b6bc269
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to contain metadata related to its creation, including a URL that is also present in the IOCs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://synerhu.ru/uplcv?utm_term=define+abstract+in+a+research+paper
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c22ac6acb---zojad.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/d65b94fecec7bf4c51b9e8c3805640c2/wenavinije.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160831ac6b0d8a---32381475616.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/7f04ef565edf52aa902212083c8eb91f/4087675862.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e28387d44---6271136157.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/cfpj7cddsogg3sde5uechiisql/45126258549.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/6v5fqba0qho59jpsb7aa4re7l6/netazamexamizojotug.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ae00439c953---53427727023.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/55d5411ec92286c7ef9123c4409c0682/femopofukumujev.pdf
    • http://capmar.eu/userfiles/file/rofimiginezasu.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16082e95d89073---98520944355.pdf
    • https://alakharia.com/public_html/userfiles/file/33132886436.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/0ihmjcin0okugr0t3eka9t65v5/vutuxegakosusobujosefusob.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072019242637---44016955360.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/5c7dddeea5bda30fe0b54047c5178791/giwuganivogutevaze.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f543.bin
c437a5fe06668899d72f40f39a82d5aa5bfbd499871c8c2a1a719ab6e67ec8d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 5212 bytes
font_01_sfnt_off000106fb.bin
5bb9a909316438e849eaaa6e11ee7770f716e7d3dc2e5ae72ec8e455140affc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106FB 10584 bytes

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