Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedae346f53dcdbd…

MALICIOUS

PDF

87.2 KB Created: 2021-09-07 20:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 58cc759baff9ca1b58e010e9a0053557 SHA-1: 6125bbf7e82de0efd930ed07e9e9f2422c002656 SHA-256: aedae346f53dcdbd36114a6f6f1d98fbf561ca87b67a1b0d12fedbcb40a26f34
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure but reinforcing the malicious nature indicated by the embedded URLs.

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://catamma.ru/uplcv?utm_term=descargar+gantz+manga+a+color+pdf PDF link annotation
    • http://go-forum.cn/upload/files/kapivovabovefosoka.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/0618e211cfed37ee30d7942f1d6e5530/kitenosedotezubamexata.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/xijofexazepuwube.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-8-28/20210828022251849375.pdfIn PDF document text
    • http://shsuorui.com/uploadfiles/fckeditor/20210629/file/16249529184866.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7540bba8f6---fatoworewizadazimeta.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/jezal.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e21e6b54deb---23051798690.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b96f71df40f29f673fb06f78234723c3/suwexeludodezow.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f03f592c2c---zabikumupotasirogedadu.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/51790816327.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/feabfbf19bedc8b4edea741567b9a1f0/salujid.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9e05e3342---16305239848.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/088a9d608ebff7d1abeebabf4ec05674/33865495965.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074905e656eb---63912388802.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/98969108025.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/kejagi.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607648db80644---lapanibagazulosi.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/vibutamosisizis.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/96454242472.pdfIn PDF document text
    • https://hamasataccessories.com/userfiles/files/63657560118.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d80798fef7---27875523001.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/2840a9aad8298952ddb6fbbe823aaf59/xutubowuk.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/cb7e53ac64c07055a5f8f7895f1e736d/jixebofunibil.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/13373760322.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001026e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026E 19428 bytes
SHA-256: c844debd749c3b7502a97a975badfb5e084bd73ff5ea8e2690182c1fa1e8aa2b
font_02_sfnt_off00013562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13562 10932 bytes
SHA-256: 15f9f69b4d9bf11e5e3fec93ec0625ce75c5cda2ed27831b6c9ba36f5a276024

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