Malicious PDF — malware analysis report

Static analysis result for SHA-256 070b2da6d8612ade…

MALICIOUS

PDF

94.7 KB Created: 2021-07-21 01:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0892fefe0f01e787d1d426eb75fa3b50 SHA-1: d20239ef7085f58427ec1f619839b27eba36a0ad SHA-256: 070b2da6d8612adec3170593592c776d6025a51a4b8e2941067ad35646614524
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbd8ead376---masaterufoven.pdf
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/63787350933.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/0928acb25d663edd468e4502b6c45a75/kajixadotexe.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b741e21ec9---seledodunofizusoz.pdf
    • http://adamlegal.com/userfiles/file/gowazavef.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609738f5bfe69---sipumifusenimitenow.pdf
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/46331426601.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a215264342d---revomejigugimozojeku.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f7d55b31e---49854685233.pdf
    • http://amoy-art.com/Upload/file/6849181732.pdf
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/guribovegubiteji.pdf
    • http://www.saito-ken.jp/userdata/file/24182309603.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607371a30a1fb---jamesogel.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/h1g3vvpk6fddh57v96cmun9pd1/zafom.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/649a14b074f56d7ab556b5d2edfb051b/33955161883.pdf
    • https://toptenstudy.com/upload/files/BodyFile__60E15BDAD1CB4.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160f37fe5188d2---24061952514.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/aed65d07b5f9416a2d7bfc3be0e2b1da/jokavegidis.pdf
    • http://kojeneckezbozi.eu/userfiles/file/nitij.pdf
    • http://df-2.de/images/daten/file/59270362981.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/31690369968.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd3276b390---papibodulavawawu.pdf
    • http://mayjack.com/upload/files/dusuzitiraromadu.pdf
    • http://stensoproject.com/userfiles/files/bikozoxoxuli.pdf
    • http://color-gateway.com/userfiles/file/fibakewugenidonupojapet.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=the+death+bell
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 16792 bytes
font_01_sfnt_off000108de.bin
37df469665a655324182ca331d7958f3213b2bde7d4dee1aa1f5b3c445d1075d
pdf-font-stream PDF embedded font (sfnt) at offset 0x108DE 9864 bytes
font_02_sfnt_off00011ea9.bin
8c2e9d80d580d08964a5048de7b59c27befd741f1c379efd0abbd599686b3e88
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA9 16216 bytes
font_03_sfnt_off0001344d.bin
038a125eb32e5ea9f08f8a4fc9c41a3c458dbf86f18a2e1e120f417e329201b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1344D 1804 bytes
font_04_sfnt_off00013cce.bin
22bba535848149a0b1553e857ea80d10e88c2a4b7f2c1d3b005a51166a718b0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCE 17836 bytes