Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7fa168fb72a091…

MALICIOUS

PDF

93.5 KB Created: 2021-08-08 02:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a7e29420f64472117abb1065cd818c6 SHA-1: 736fa3f5247854f4ef379936748715deeb071923 SHA-256: 9d7fa168fb72a091802b9616eb5cc047e437d161e13083a36ea7ab0498fbf3d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, indicating a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lead users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/541da54458a1f8fa654cab5f262d9001/bawodiwemolemi.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608503c032f84---zumoxidoji.pdf
    • https://dolmalatrek.com/userfiles/file/linirevopog.pdf
    • http://www.ferm-matic.fr/upload/file/53199354508.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7f28e496a---jogatirewidopizok.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2ed9a8adb798dfd140c4e681e1083128/rasuxabewogabujow.pdf
    • https://afayl.com/userfiles/file/28316207742.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc7a30efbc---8627786329.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160844928e8456---11612954636.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/tpele2hr67ljqsimnlh1062vu7/73237978877.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d3b9a4b58---tusot.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/lekoriloxefenotukogasagi.pdf
    • http://elsekmont.eu/userfiles/file/numutodinepesojafo.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/ff8b4c33b951116e0ebb361e71f9753d/8128915123.pdf
    • http://jnafarms.com/clients/864068/File/39766175334.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bbaa06565d8---69260115472.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd57676d8c---pafozumekeduveludofevu.pdf
    • http://syuncyoku.jp/upload/file/zemibojiwig.pdf
    • https://eucolait.eu/userfiles/files/53225524516.pdf
    • http://chobacgiang.net/webroot/img/files/sapusuvenuruve.pdf
    • http://www.parinet.fi/tiedostot/files/pezadusuxotamoji.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c37136417e1---sifuzisamenuxinapa.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/a4eaf445ef55273ab0deb1553a65f50b/nobur.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/ag57r72tr35ipstuunh99gf4g0/zilapuguvijogixaladi.pdf
    • https://europawindow.com/app/webroot/img/main_content/files/28354511199.pdf
    • https://ahirealty.in/admin/userfiles/files/fewazitabivubu.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa279292474---24513284142.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=phoolon+ka+taron+ka+sabka+kehna+hai+song+download+mp3+pagalworld
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07b.bin
09c44ef6816f003dbd228c1d46293dcd8980850115b5f4e43b09d7c6ce7a63ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF07B 17380 bytes
font_01_sfnt_off00011e49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E49 16792 bytes
font_02_sfnt_off0001365a.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1365A 16144 bytes
font_03_sfnt_off00014bda.bin
f51e07a1247e6a4a518c740aec29f69db5a1db16191c659ede70866be53cb3ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BDA 11328 bytes

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