Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09947bd5f8ce513…

MALICIOUS

PDF

71.7 KB Created: 2021-09-09 03:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d20e5196a4e743385b5f0e7e3cc1fd61 SHA-1: 951812fa6e15c79a3ad87a6b45a51fc7bbae7af6 SHA-256: e09947bd5f8ce513d56f438fa89ecddbcc90dcd47bb5d63f6524e4aa26a62fdd
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 phishing or trojan threat. It contains a link farm with numerous URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the heuristic firings strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://tentimesneedlehill.com/UPFILE/userfiles/files/27508579839.pdf In PDF document text
    • http://lemma-studio.pl/userfiles/file/fevebisuzoboposogonajafoz.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/tuvijumejuloxumulizema.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/57796993644.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/1988006319.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/10b8082270d9543e829eb6ac41b68df1/21764770319.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/vosavoxanukanabefap.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3e21dbb37f697aede87495d34706e6c9/nowubusoderokebegej.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/86789532525.pdfIn PDF document text
    • http://bamila.vn/luutru/files/powunazikofoxemexo.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/86391408158.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/xojuger.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/3928227777.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/45232205812.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/biromidu.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/161302ea8ee9c9---86407414324.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/57500019488.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/ronirokiwawonapoke.pdfIn PDF document text
    • https://unitjaya.com/contents/files/53369053222.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=new+bollywood+torrentPDF 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_off0000b614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB614 10136 bytes
SHA-256: cc84c95d6771853c3febb860f9f90158d4add4d9e21ba23b9f7873fd0ff25be3
font_01_sfnt_off0000cce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE4 17716 bytes
SHA-256: 61a5a19934847ac647cd9a7ea484b241c2bddb790ca2f1e83f5af83c024259e6
font_02_sfnt_off0000fa02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1