Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb045ec0862dc90…

MALICIOUS

PDF

83.1 KB Created: 2021-08-20 01:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 565f2a388abf399fcf59b88b3c463951 SHA-1: 8115aae7f75977682005027103864c600722c691 SHA-256: 3eb045ec0862dc9091e58da902143fbf9809557ebaa3a7e8fe0088950c0aa39a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://qataminational.com/uploaded_files/userfiles/files/84900430219.pdf In PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1611a25435e122---gosadepobigufevuru.pdfIn PDF document text
    • https://teamcode.net/upload/files/54614880012.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/tirobetona.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/282d67e7adb3f7c35db7d3ef8fbadeca/23869785532.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/72961905867.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16095ea2be93f4---jujalirufapomefaludu.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210819_025231.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d73a13fa4---luraji.pdfIn PDF document text
    • http://geodez.com/pliki/file/mikikobosibanepifobefuwuf.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/jipewebuto.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/413742789f82cea393e9112be0554c4b/50800742237.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a0e3a5958d3---pupogivivefune.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/m23j8c8ksuqhhjtjgb7k6135r8/jazexegezisemex.pdfIn PDF document text
    • http://artospace.com/pics/file/74864117775.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/gotosumigaresenataruji.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/simefitobeguvel.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/tuwowulezesipisofojuk.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/64139489612.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/3491717312.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33bab9ce38---sojagofelifosad.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/29610944043.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/kafobab.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16094039b53441---wukafonurut.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/90c2941b5471a2211b8be8e4eb71c842/9423631666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=harry+potter+5+google+drive+mp4PDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE118 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 16912 bytes
SHA-256: 4ae47ea320b12985b467f0e8f661d843e11984075d9f417f0ec9953d5a341099
font_02_sfnt_off0001255f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255F 10848 bytes
SHA-256: db8ba0e79b7db1a5fc6785e002a904870d614eb95777217703b86402ab0c39cf

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