Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f6ad713d5b1fb7…

MALICIOUS

PDF

90.5 KB Created: 2021-06-26 21:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c318805097d8b7410c2a9ca7fe38d01d SHA-1: ec57440d6e25a55b92e4b53f0ff17b34fd0d404f SHA-256: e6f6ad713d5b1fb7242d8293a6b4221184efebc2ff6fe0c48251ac3097ab1c45
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The primary attack pattern involves leveraging compromised infrastructure to host or distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0de69cbf3---43223005943.pdf In PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/re257out4vllnodl1ud78002l1/verosinekix.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baad4339a3f---11817186263.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081be34e02c1---69261452529.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/78742233319.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/rigimosox.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/99731012994.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d23500c80---powugitotegiguvewagidu.pdfIn PDF document text
    • http://fletcherfamilyreunion.org/clients/52745/File/44517623855.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a4bf48d49cf3ef63ec2374882ca382de/42613379288.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/gajidosiropo.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4973c41ca9---gosimimujokavinedexavuled.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/gazirasositilisepive.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/wajojelal.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/7njrf3ug3dp8ub6qpq4ltl5f6t/kizovodem.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/54565233398.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/tuzikunesusetarami.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/sedizizumenidadoruzaga.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce2910fdba---47277519530.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/a987fbbe92796a905da78585264d6c51/tirategefenafopupesuxi.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/r4rt3d4bdmlslrmqpne3rh9mo0/41017859557.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/vodalawulirabanamufa.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18c7700730---labat.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/f316cf7ee18aded46597a7d437d92eb4/fiwemebu.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3145c3aed---39009633295.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=tone+arms+without+bulkingPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4D 10936 bytes
SHA-256: 6689133f87ac21f205606c47f2afc7fd45dcb7aebbea3357f1889232d2346bf4
font_01_sfnt_off00011686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11686 17216 bytes
SHA-256: 3013e02cfa18ca7f0edafffb26fdca590ccc8f81075d8a3687b25224e60d06c0
font_02_sfnt_off00014331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14331 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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