Malicious PDF — malware analysis report

Static analysis result for SHA-256 10759368b9443063…

MALICIOUS

PDF

87.4 KB Created: 2021-09-06 08:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f76cf6ea414616662f3c370c37dfcfa5 SHA-1: 3bbba9376f74465f2de561dda72109fd4bf18df3 SHA-256: 10759368b9443063e1ed6cd98d472fdc9aa67c9bd750c6ee6d7c8b6c160af1a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous external URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution, aligning with the characteristics of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://restavratorstvo.com/ckfinder/userfiles/files/80240346474.pdf In PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac40c4b989---84863638183.pdfIn PDF document text
    • http://trekkingsapatours.com/upload/files/53343370391.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/48670329380.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/85436621548.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/82143190578.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/38737999252.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/936799254.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d53c92805c9---64994816645.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6937918d4b215be48580b2bcf349fea6/56873954536.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/tlegb2a5vlluogsnf97at90mts/debukopiwi.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/7484727040.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160aadf50e78a6---93318841154.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/9jbp5htihvn5pdiooa2v01k2le/rigoxazodeketetuwoki.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/43189074673.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ff5c0cdb45bad67059ef25b5f915e5f5/67421357685.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/52298864169.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/11426653584.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/fakizolubed.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/nt7t1nh9om1lhttmpnspvj75t6/soguziridavinaxikeruwomad.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a54620e59c8---vawesepunojijatewolebus.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/c7e70661101dc6ae8de3a5df79cc40cc/16068856359.pdfIn PDF document text
    • https://laser123.com/geektic/files/20028593301.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tefidujog.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/28157706236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=2016+foton+tunland+manual+4x4+dual+cabPDF 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_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 19144 bytes
SHA-256: d8ebd022dd0020a2667d0fba2767c7a9cf3dbe417d18a294657c3291da9de457
font_01_sfnt_off00011e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E36 10928 bytes
SHA-256: 6afb2da36f959f9a6409f3f306bb0d34e5770d71508a99a4429240c3af9eb796
font_02_sfnt_off000137a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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