Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ba060ca5f78aa9…

MALICIOUS

PDF

89.5 KB Created: 2021-08-16 03:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0aed8f6025d6cb08a3b09ceb57caf2a6 SHA-1: 66c459654fd803faeb7076900762e54fdb274189 SHA-256: 10ba060ca5f78aa9bfe49566bd7082eeb5c41c959311f2989832e8a5c5b340ce
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to distribute further malicious content. The presence of a 'PowerShell.exe -NoProfile -InputFormat None' token in the document text indicates an attempt to execute commands, likely to download and run a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://diamondsnspurs.com/clients/12200/File/60806850238.pdf In PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/hfavf68fdntns7sjvsc6av3hth/norejeliderelipaxizaruzu.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/xilapakijir.pdfIn PDF document text
    • https://kientrucqhouse.com/uploads/image/files/wukavoloka.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/voramota.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/miwumelamulipejidep.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/93542821381.pdfIn PDF document text
    • https://kham.vn/userfiles/file/81097552566.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/19033397569.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/bakadetadoruleri.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///rezolomapatatajupesip.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/tevifepavotomagonubu.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/38115443928.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/ropizupafal.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/1359008954d6f48b3d43136f8e410abd/16435045209.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/r62558cgof5a173rug0bllhge6/23915844482.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/fb4d8823265ce13d160213c5c2201531/kedunenevogemu.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/68329132455.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/tigadanuzumo.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/gexabokuga.pdfIn PDF document text
    • http://alkanboya.com/files/file///pufajexigov.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608476c658873---tabinanilubali.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/38619572379.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/27212999406.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=hotstar+app+free+download+for+pc+windows+8.1PDF 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_off0000f393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF393 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA5 18476 bytes
SHA-256: 4a506e4f1980cd7569af46e573a7dcb3b0c4354600ea3cd9d692c6ab0d48965b
font_02_sfnt_off00013c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C75 11016 bytes
SHA-256: 09a7d146d6049df2bcee0cb3e83c2ed347bc45ade2eb8fa2d27f3e78911a0c23

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