Malicious PDF — malware analysis report

Static analysis result for SHA-256 38611327c27b8060…

MALICIOUS

PDF

82.2 KB Created: 2021-10-05 00:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 413934679f10ac08090e2d2ada4103d1 SHA-1: c67c2f974aebfa0412edac80367c27f95d018675 SHA-256: 38611327c27b8060c20703b0a99f4b46e9eedec1de4b1d5fa14b6f7358f0b6c6
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to disposable hosting or compromised CMS upload directories, indicating a link farm or SEO spamming operation. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly suggests malicious intent. The presence of external URIs and a link farm structure points towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://akemi.ro/hirek/file/20451286087.pdf In PDF document text
    • http://superfasttv.com/uploads/files/32215566959.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/wonivafegupidazevifix.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/rupopibure.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/80783850087.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/valojobema.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/91167587511.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/milivezalegivojovuter.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/doxefetererutumo.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161405c86cfc1a---53257485590.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/lavekizatur.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138900ce4882---wepafa.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/femomuzin.pdfIn PDF document text
    • http://nhatnamvina.vn/rich_editor/file/68879079423.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210926014924177.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/1d6be411f5ab60ed57b0b395a1bbd713/9438101782.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152148cf3e23---16201999622.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/xivopuk.pdfIn PDF document text
    • https://motecx.com/images/file/depumi.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/4681023767.pdfIn PDF document text
    • http://standdominica.org/files/files/gapolafogetinulavo.pdfIn PDF document text
    • http://oilspecchem.com/files/pemobez.pdfIn PDF document text
    • http://119pump.net/d/files/43626421180.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/10910716467.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/29877721972.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=funeral+speech+for+unclePDF 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_off0000dad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E5 18848 bytes
SHA-256: 21d478c73a449df3123072baf11e1ad87555917db59e52e39a7cc199ece3c17b
font_02_sfnt_off000123ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EE 10464 bytes
SHA-256: 274b075096b5fe3be867e4c4883a3903c789041e7146466cc52a0c5bd1249a95

Open this report in the interactive analyzer, or submit your own file for analysis.