Malicious PDF — malware analysis report

Static analysis result for SHA-256 014d7539ecdaf419…

MALICIOUS

PDF

79.6 KB Created: 2021-08-27 03:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a37b9caf87f469d6ae34d5bc7663c8a5 SHA-1: efc7d33ad537653c570149e93e503fef546bf871 SHA-256: 014d7539ecdaf41902cbc4275625f40cbfbb1fd9b081bfcc536366c9b8f5e2f5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high number of links pointing to compromised WordPress sites and other disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the link farm suggests a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://yournew.site/wp-content/plugins/super-forms/uploads/php/files/b6olmlgpc8gson1rr6g5a190uk/30192112198.pdf In PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a32b948a63a---gixokunoralujilinesetobon.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/loladeseluxow.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/58093dbb36e75e7f0e478549072030b1/pimetezilalo.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/94712afbadb1ab839b27fb2918a2d2fc/fawarunu.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607de9b579944---38407296724.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095eaedf23ab---gogoseguz.pdfIn PDF document text
    • https://chp-travel.ir/data/file/namolutowepopevelukam.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160826b2e17465---78202772099.pdfIn PDF document text
    • http://clinicaveterinariacittadivignola.com/userfiles/files/61021126018.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/84745055880.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/wakaz.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/87498888150.pdfIn PDF document text
    • http://apogeeconsultancy.com/upload/files/48724202325.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021062912041742.pdfIn PDF document text
    • https://broodjedenbosch.nl/ckfinder/userfiles/files/javegunafas.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/64271027828.pdfIn PDF document text
    • http://regcureguide.com/files/files/fuvadonivi.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ac2eaf777da234122772a546bbe3d197/bukugidux.pdfIn PDF document text
    • http://tms-operation.com/upload/files/daradejukegupexos.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/609dhlmkv2vc1ea2kntlc1g4i0/jofotijuv.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1eb7fa7643b55f2f119c575b06cd31b5/jerewafilovomufeve.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/60168672857.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/684fd7a5290c3e4019fe5977c4807c37/riviniruv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=the+sovereign+state+worksheet+answersPDF 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_off0000d092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD092 18888 bytes
SHA-256: cee2125f60028c1dcf4cddf8454af48918b7b02fb2259bf6deff900fe83ba9a1
font_01_sfnt_off0000ffdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 10548 bytes
SHA-256: 59ec34fbc28a753136bd475cb79a21b7fd6fdf8d50eb32734529c096be75fb21
font_02_sfnt_off00011803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11803 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1