Malicious PDF — malware analysis report

Static analysis result for SHA-256 d388a6753ff8b3bb…

MALICIOUS

PDF

82.0 KB Created: 2021-06-27 11:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 15cf419eaea6bb633ab21480f55aadd5 SHA-1: fa55e18e874c6885e25f91eb42c48103a541c21f SHA-256: d388a6753ff8b3bbb9e2de5bd7569a47456e473086f729b9541811a53dd4b916
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://fixmyhelicopter.com/project-new/christianbook/upload_images/file/8450515444.pdf In PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/115199576.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/30104422310.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/51a4f7dd4431e343f53b7c4c31d8bc79/wufonozogovezepi.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607414a132808---miwiluviluvanujeropux.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/zazexafigetaweneduxo.pdfIn PDF document text
    • http://18554080.com/userfiles/file/larifa.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/43738995930.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/dekumekude.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/44097293867.pdfIn PDF document text
    • http://nutrisoilvietnam.com/upload/files/60238179104.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/9efv64vv529fefe9a0tc0mk15g/63121822927.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/squcco7apd9pfhgh46vp19ttu7/veriva.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/eij7jamf80daerolgsuhpvpa5d/479105453.pdfIn PDF document text
    • http://icmasistemas.com/userfiles/files/lagarelobejovujupojizib.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/bbb28dceeb69151707841f06b30436b1/29619023611.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/fajotole.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608656e72251e---xelabip.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/811e39b11e9d2417c3925e7a1887ed00/70018884810.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/xidofo.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1609447ae3ec35---60286035465.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dda1fcc94c---mizavipedenakudutedirep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=informed+means+armed+escape+from+tarkovPDF 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_off0000d7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CE 18424 bytes
SHA-256: 46b62b2e7be6c213d68a9e6078b883eddcf323ba78daba7e5d390be9f8f16a74
font_01_sfnt_off00010864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10864 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001207b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207B 10752 bytes
SHA-256: b770d9af89ff463f8f3c80baaac904b7b05a25d7a39f9b7cf9bf661e2ab832d9

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