Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b5f61dcad60ec9…

MALICIOUS

PDF

77.6 KB Created: 2021-09-01 08:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a338dc389123b990d95d31fbc45d0ed6 SHA-1: 08df3f94ad54555ce1c2ad3c91b75ac503be2d55 SHA-256: e0b5f61dcad60ec9b2b39d6145f2dcdfbffa96d54260061c7a2462d9986411d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. No scripts were extracted, but the structure strongly suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7988

Heuristics 5

  • 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
  • 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=malayalam+love+quotes PDF link annotation
    • http://furmanreunion2021.com/clients/3/37/3732e4fa3878e851f9d164dff32a9cbb/File/vefiforapaf.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/15202949498.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/zomugesivukapolelafixi.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/dewewax.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/eavfotic1hsitf98cu66mjnsd2/1754066579.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/44029010612.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a29deafded35f33c4e66580ca87914dc/tomogotiw.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/63s9gvpinh2f3lq5kcnr4hd3b0/3473820983.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c39b50eb085---84449144952.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/e6rgo4bnap3h81hb6hef91ffr3/31586644748.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/nisozuxowufuganu.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/fofenurowa.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/pebaboleso.pdfIn PDF document text
    • http://strandedtattoo.net/file/35275077390.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210706013121.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/zetobowirijuke.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/21642616430429da8ec4044724468555/fomuzigubagegu.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f368530c9d4---92477099960.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/gagitememoporugugut.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8e8b97ac9---pewerukigazo.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/tipuf.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a61e614cf---26804390693.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a363eecd3e3---tapawesafezowujimoz.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/budazevoliwipupevikazake.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/eda903922bad95e3d51e1be3739ae088/95332416500.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/62262104629.pdfIn PDF document text
    • https://actorconseil.com/files/file/guramasemavavopidazefuv.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE3 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_01_sfnt_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 10392 bytes
SHA-256: 89cb8ea3ff0c4c012becb572b3a2ee041c9d8bb44fbdb4ab8f7f9f96e3f2abd5
font_03_sfnt_off00010531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10531 19616 bytes
SHA-256: f1929d170df5b9ed612e0a1d3ee7818e29521988f62b805f9b96e0099a1a0ec3

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