Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c9da982a1c71cd…

MALICIOUS

PDF

91.4 KB Created: 2021-06-25 20:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30678de09519531a74aa55896dbf1e52 SHA-1: c41798c9c0637c44bd9578f8d5c8cf5f668b1763 SHA-256: 65c9da982a1c71cddc36dd74ef12f4254eb1993a9c1d375e720e88613930ad69
176 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. It functions as a link farm, containing numerous URLs pointing to compromised WordPress installations and an IP address. These links likely serve as lures for phishing or to distribute further malware. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a763620418---mitawuxiza.pdf
    • https://wrd13.com/force/file/jizugowutemitak.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/n60ted5ba8khokhrdkd2qgh62m/46072540342.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f9bd77150---52669705968.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/61igkh9urih89brdq9nl3eppt1/52090510971.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/5c84da367c8dcfb30e1011d39032f820/matopanotodobazamasiruvol.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/eb1068c248b0756060a2d6257037d1b0/fevonixijofipebawe.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079d23d9255b---xepexifawuf.pdf
    • https://xosobacninh.vn/webroot/img/files/peguvakaxig.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c67617595ee---fevapebezikutowe.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/77e570e06b483f946e5daf64d3bf9f15/gebik.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4734fbf5---zijonakiladosow.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3a617e7a8---merixureguvosataje.pdf
    • http://au-zlato.sk/upload/files/lotadivipipizedapazeliwit.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/19813f2bcf3f5788eb7543a5f1cb42ba/99036843693.pdf
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/susezamawuvozaze.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc4cb357b0---60715645717.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/ebea26a329bab8b99b38f43641971303/79207818504.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608e175c7685d---95216126328.pdf
    • https://accuratesearch.com/userfiles/file/93085391811.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d1a4404ba---dakewabefuvogadakudupaju.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081631222350---mezajutawasom.pdf
    • https://kuepancong.com/contents//files/87287218316.pdf
    • http://onlineticketreview.com/images/file/ziwuledukajix.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/30483714815.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=spider+man+2+games+download+for+pc
    • 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_off00010136.bin
3ad671a237a03c925f824df6168e32c3f59b56932f725e7078f39fb52ca8e3ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 17448 bytes
font_01_sfnt_off00012e67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E67 16792 bytes
font_02_sfnt_off0001467e.bin
561198ba74ab9837d95622f66747ab36d365920de7d17f1fbe4eb6adece54f7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1467E 11144 bytes

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