Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9d766131939f73…

MALICIOUS

PDF

94.2 KB Created: 2021-07-21 01:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e205fb54d581fecac577b5751c3a4fad SHA-1: 4632a8a14c1658898dce15160504e6d5ac8f1b43 SHA-256: ea9d766131939f73d70b68345e7c9f586ec134f22b34dd833f79ed8205af10d6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other potentially malicious domains. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1c3d6fca---gedapupamudi.pdf In PDF document text
    • https://baxsporthorses.com/userfiles/file/lebowezejojuf.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/xidofitoz.pdfIn PDF document text
    • https://kede.org/userfiles/file/11075020016.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/23993353905.pdfIn PDF document text
    • http://www.moyekolodin.com/files/54240188009.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/dc420e920181ae04ed81de22af2ef0bb/labokexapug.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/vokaseravegar.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/pjtbnglq9gqsvdum1ag1s7mcoj/tupodu.pdfIn PDF document text
    • https://kawanmto.net/contents//files/53861392602.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210704090357712.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/85670393251.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a21fe92c313a5479cf42727f7a4f1111/29687793456.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/89789127633.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/79496434835.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c55a09f4389939cea4ab05b1686f60dc/kanenowa.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/67d73ea2c24dd553df9e7a5329b699a0/39842745913.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/51ecc8592dd1639d5de02b1340d52fb8/segunapuxi.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9f5288df6---dekovej.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/pkdprfsqt61cm5cgddc3j8dp04/fuzuwokor.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/5e9d924fc9e3d7ac4f82bd89abcd9348/ziveduxutonefemabimipem.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6963892f78---kisufizilutim.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/88713454098.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/6fe8848658bae4600a0b740d3cbeff86/6544719121.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=research+methods+in+education+pdf+free+downloadPDF 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_off00010bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000123cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CD 17364 bytes
SHA-256: 673995b8e5eecc163185375564416389ade6c5caaf869ae398f9b56ba0faec96
font_02_sfnt_off0001514b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1514B 11116 bytes
SHA-256: f8c3e68a5eb1b39da2891967599512fc19ed390d8c6df8c2112c2da285bde8a6

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