Malicious PDF — malware analysis report

Static analysis result for SHA-256 9677ee8bb21f45d1…

MALICIOUS

PDF

89.2 KB Created: 2021-07-22 09:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54a214247e2d53cca3c6b314f3376a16 SHA-1: 0bf1c565716bc236a5eddce72270db1efac439a0 SHA-256: 9677ee8bb21f45d123ad5e9d4248939ebc3957497639ad2afe7f295dca76ee66
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting domains, suggesting a phishing or malware distribution scheme. The embedded URLs and the nature of the hosting indicate a deliberate attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xn--o79av69abka850ab6c.com/upload/file/202106140352216120.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073703005b75---91510599899.pdf
    • https://bodymart.in/ckfinder/userfiles/files/zusumujixejuw.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/27341ac8d0135c1067640ce34ad9d7db/solosexipolesod.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/71036228536.pdf
    • http://residencecarlofelice.com/userfiles/files/85905234688.pdf
    • http://akcjonariusz.com/UserFiles/file/25340463077.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a985f2d73f3---27459242300.pdf
    • http://hudsonohiohighschoolclassof1980.net/clients/7/7d/7d4b1ad73701457990394555a34ab01f/File/18364869667.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c71099ccca1---58019949213.pdf
    • http://aylincinarli.com/fckfiles/file/26866206415.pdf
    • http://eternoohydro.com/d/files/segeseridobumusul.pdf
    • http://brcassociati.com/userfiles/files/93496274624.pdf
    • https://batikatravels.com/userfiles/file/51841777905.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afe9e07e1e---sagerepesubesukuzane.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e494e50c6c---puzizuzubidisesokagop.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1e578f3f74761a4e30796936a16edcee/vobodixopozarudezejomugo.pdf
    • http://gloria-eurex.com/24529850525.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d29be0ab523---xolusiziji.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/8356ded98a74fbf72c0e85b3b11277ad/83724071559.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b031014d8---zedetulekovetupazevade.pdf
    • http://gamax-motor.cz/data/dokumenty/vigefe.pdf
    • http://czdashan.cn/uploadfile/file/2021050207364373499.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4b582a21a---86456226045.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+do+you+dive+botw
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f137.bin
bdff35b38a4793a5c54a5ea2a5206062ca8ff11d3e4f77a6ebba4fecc8226f2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF137 1904 bytes
font_01_sfnt_off0000fa19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA19 16792 bytes
font_02_sfnt_off00011230.bin
3d167fe9a7a0f71f268a5a2296cf8b1b47cb248a561a4d80134671b1f2175a3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11230 10156 bytes
font_03_sfnt_off00012907.bin
8e2feb996a0ff693bc03a862d5c30707c045f08ea5863d385c92413958837a8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12907 17372 bytes