Malicious PDF — malware analysis report

Static analysis result for SHA-256 9295ebba5af642bb…

MALICIOUS

PDF

85.4 KB Created: 2021-06-26 13:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb1ddd0eaa70ce05bdf08b2515fb6db8 SHA-1: 35bbf06048f01f8a3bfd397ce264a3fd4b0a42c1 SHA-256: 9295ebba5af642bbd49661e7cd4622d8518fba9bf8206aebb6b6f1f865d213d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: 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 various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to direct users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://allseasonsart.com/uploads/fck_uploads/file/vubatimegasewalajexadop.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/5ecfv0nrh1g2vchun539qq1rq9/10512674764.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f641cbd21d---kiwik.pdf
    • http://anhopphat.com/uploads/files/napebemovomunij.pdf
    • http://cy2hand.com/userfiles/nomidutaguzogomudijonogax.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c870312c4d8---vifepusowutigob.pdf
    • http://stlnsk.ru/uploads/file/zotazemudegukibezibawap.pdf
    • http://americandeliorder.com/uploads/files/74791411585.pdf
    • https://open-call.fr/uploaded/files/99220482492.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf22be24419---gogipiwevobesiwono.pdf
    • http://www.kickcommerce.com/userfiles/file/40442548949.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/qno183mpqhnug71faosak6car5/bivuwefuduwegizumu.pdf
    • http://ekotronic.eu/files/file/momewemalodo.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c898e942cdc---84783444017.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3a64d9caf---2719271320.pdf
    • http://daindnc.com/fckeditor/userfiles/file/23586795448.pdf
    • http://bacsiha.com/public/ckfinder/userfiles/files/90210969483.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/67bc232ff40b93e524e7adabffe4d18d/16488981025.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/72543541650.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/kovo8nge2vrtpn6agkpo085dcp/30729766221.pdf
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/75980938113.pdf
    • https://xo-sound.ru/userfiles/file/30598777249.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+boost+score+on+snapchat
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e932.bin
6d894bce9b37901ed40f16d0f4d3f9e90806fa217def8769b31f51ff1fcfa77c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 17732 bytes
font_01_sfnt_off00011731.bin
c87cb7b84761d6a232f1ce2d38cd3ee380088655d631f0d7b664d4243bdac004
pdf-font-stream PDF embedded font (sfnt) at offset 0x11731 10548 bytes
font_02_sfnt_off00012f0d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0D 16792 bytes