Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5e48fe48bae80a…

MALICIOUS

PDF

74.0 KB Created: 2021-08-28 03:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63e496378d8fd5dcdf94f080893c3dbd SHA-1: 3b287a81785519b4c5fe570b9c1c11d2b467837e SHA-256: 8d5e48fe48bae80ae36168d482f5ae1ebe249052f81af7e3a5ac56fa5381c6c8
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, including WordPress upload directories, suggesting a phishing or malware distribution campaign. The file's structure and embedded links indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/cbv73f34b7qkup6k2i8at63tf6/74099098225.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f832cc475---61714920383.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/1160f6d7bdf1237ea76e21aa07a10282/25596228886.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e322463f---42494911824.pdf
    • http://telekommarketing.com/firme_data/files/8243842333.pdf
    • http://gazosilikatnn.ru/uploads/files/85318706667.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b8889273ac6f704123b66a6ccaa71a88/79408775184.pdf
    • http://hkalc.com/userfiles/32047463841.pdf
    • http://smsgurugram.com/miet/assets/files/paxenoluxajomifogosi.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c796a0953a---xowemivefutapo.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b70f187f2---39233787107.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7d281c7c2---45946165668.pdf
    • http://degrossier.nl/uploads/file/vawesox.pdf
    • http://air-ned.com/uploads/files/vabarabodipikasofufelu.pdf
    • http://ucity69.com/clients/861769/File/37616824641.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a600a49ff53---porafipiduzetolulunisim.pdf
    • http://sergeybazarov.ru/file/kagelozerepupetazujo.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ms7ukfdlbqdveru3u8i5es4dhd/menigezibi.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f0f82dde7---fawunobigizemifazibagu.pdf
    • http://nextgenship.net/upload/file/20210622162437080427.pdf
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/kasijupiwofegogub.pdf
    • http://vitajeans.com/ckfinder/userfiles/files/38285616481.pdf
    • https://parklanehotel.asia/userfiles/file/vuxoledimupubedejum.pdf
    • http://chono.mn/uploads/userfiles/files/16356077723.pdf
    • http://faurau.com/luodan/images/userfiles/file/mikufof.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=which+is+bigger+pint+or+cup
    • 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_off0000c006.bin
a0aad2a2fe06b22c3131092db2cdada782efc2c90e43e0f7f2575bb10070e8d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC006 10680 bytes
font_01_sfnt_off0000d84d.bin
169289fe191c1478e956bda8913fdf5c73e3fabe874d3256d3977582bc853da5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD84D 16480 bytes
font_02_sfnt_off0001027f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 16792 bytes