Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f06ed128567ba9…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 21:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b73cdb0bd8a11918a3013475d44f0da4 SHA-1: e35672308920812cb59af654d9326826b2775a2c SHA-256: 02f06ed128567ba9cfa569945e8f110b31a2c726eb9eed1c774386443a2e61d6
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as a lure to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://amirep.com/wp-content/plugins/super-forms/uploads/php/files/9fcd66360967baa73c2d8f811a30a946/74876462268.pdf
    • http://alarcon-v.com/editor_upload_image/file/15195326135.pdf
    • http://bud-drog.pl/userfiles/file/sogumojojusemof.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/b54963bf83305efe79ce8f75e145e283/30184288357.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/510cdf47ecc7aadf29c6b3a53dfbce19/lifuzibojagir.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e03cb5db---zolok.pdf
    • https://songhong.info/userfiles/file/jozobirosupovufomil.pdf
    • https://shunnasato.com/88128655375.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/vm3r25224ns5ggbsd0qib5616e/dawikebigukix.pdf
    • http://ghettaetamionarchitetti.it/userfiles/files/kasowunigamudetavobubi.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/64df3d66f845d88d2ae7f83b4977c6a6/nusaxewisasopofunupi.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f212fad1f3---13867765757.pdf
    • http://srsheicha.com/uploadfile/file/34746311806.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/6d044b05b7b4cbbc239dd0f9dd67c16f/vukijanexisidimikobos.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/pqfppve0203cacpl0idvn5be37/10878539374.pdf
    • http://jevades.com/aircraft/fckimages/file/10051253042.pdf
    • http://mindatpeace.us/uploads/files/teposet.pdf
    • http://matsonconstruction.net/userfiles/file/10545337423.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b795dc13632---xujuseb.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/bb523d8a75d2a2b12faeba56d68f6ff4/57390680643.pdf
    • http://www.icf-plant.com/files/file/77483765983.pdf
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/liteteveturisobinanogiga.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/79075408232.pdf
    • https://vildmarksjagt.dk/userfiles/file/xizoliwotipozulovegopewu.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/tqb2sv7detlaqqvubod9uu2o5f/17874971036.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=zen+and+the+art+of+producing+pdf
    • 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_off0000dcd3.bin
10bd807787d1948495ba056fcd224b263445788c12daf794f5248b2d21c94e05
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD3 17920 bytes
font_01_sfnt_off00010bf4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF4 16792 bytes
font_02_sfnt_off0001240b.bin
0d41b511cdb3e2850a448a5edbb6cc5243c8f7d3c387505570b7f9b5b8e31e72
pdf-font-stream PDF embedded font (sfnt) at offset 0x1240B 10748 bytes