Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62d5245548147f8…

MALICIOUS

PDF

86.5 KB Created: 2021-06-28 00:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ad1766e7d6d2593fe4a6c9ff9f170c0 SHA-1: 43a0af37ad21a875085401ba199cffb0782dfbc2 SHA-256: b62d5245548147f84445195fea4103d33363f7f8e41b552ec1f6fc9a21e6233b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of multiple compromised CMS upload links suggests a tactic to host malicious content on seemingly legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=independent+and+inconsistent
    • https://bodegoncriollo.com/userfiles/file/55179587293.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/1vvhni7nnfcbikel1knj0kq436/xamifato.pdf
    • https://aimara-bg.com/userfiles/file/95446317427.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a2b4dcf13---jedovezajikavuxusige.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607924f787cbe---xosavel.pdf
    • http://xdata.pl/app/webroot/img/ckf/files/nimexelofikirut.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/1370a0cb96b182f8920eed7454cf6493/farimulavejazokujonaj.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160806587eb1ff---67828490492.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/fd346c1d35e769e132a28109c8f8efc3/67405468391.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078e656f36df---xozawejiruw.pdf
    • http://brezov-gaj.si/uporabnik/file/94216758472.pdf
    • http://billedbutikken.dk/articlefiles/file/xiwaxutubekavalijadijinaz.pdf
    • http://absolutelyneon.com/userfiles/file/pokopokituvap.pdf
    • http://omonetach.pl/foto/ilustracje/file/lazuwoberujaniwix.pdf
    • https://mudraconsultancy.com/uploads/files/valedimutukadot.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d68519f217---72971602379.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0b0015011---46126912044.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bccfae7b07---fuzigatanota.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/c67ebbe13d0a68137624a83223ceea1e/25855207339.pdf
    • https://fotobolfestmeny.hu/mvc/userfiles/file/zazivipirileja.pdf
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/kawamiwugiwigo.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/683e29d1c9e223c17f43d71d2c6f7199/vofoxawavowixarifema.pdf
    • https://pellevah.com/upload/files/56182276445.pdf
    • http://ixtvs.de/_upload_bilder/_filemanager/file/33418809531.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bba02836e---52388459732.pdf
    • 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_off0000f286.bin
1f388abb097724a68abbe9a7d4a36ea91d8e28f28af77caacc2d6436227b6e16
pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 10312 bytes
font_01_sfnt_off000109df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x109DF 16792 bytes
font_02_sfnt_off000121f1.bin
c297e727f7df24f2f7c16b505cc1a9d66fc5aeb1bbbb698de53ae5b1ce7ae930
pdf-font-stream PDF embedded font (sfnt) at offset 0x121F1 16412 bytes