Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4f5633b69b8271…

MALICIOUS

PDF

86.5 KB Created: 2021-09-20 19:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 282b72012d2fab1ac85a44ecedfa937a SHA-1: 2ca98ab4b39938878e0c1d8fc994a9b33772ea95 SHA-256: fd4f5633b69b8271f4f186feba654f72ff035c86c765edd327475490b47c006c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs, many of which are hosted on disposable or potentially compromised domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of 'cmd.com' in the document text, along with the ML_NYX_PDF_MALICIOUS heuristic, points towards an attempt to execute commands or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://woft-dining.com/webroot/editor-uploads/files/lamaminabun.pdf In PDF document text
    • http://bm-shower.com/userfiles/files/25682099973.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/wokiwaseja.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/kezisiwobojimuvisilafefes.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/21040592066.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/piwudedemosegudem.pdfIn PDF document text
    • http://covina.crazyrockinsushi.com/uploads/files/didufilorogokemomumaxarit.pdfIn PDF document text
    • http://355353.ru/userfiles/file/32583442347.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/lulipevovat.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/nokasebudik.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613590fac5569---7060938217.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/bawepunalaxaxuwujareg.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/34198498983.pdfIn PDF document text
    • http://lawyersmarketingusa.com/user_upload_image/file/In PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/63cd4021484bae81de8e4f7ed1a39e18/bumusozumugis.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/85298237893.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/161464d31edf6a---susifok.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/bawarususa.pdfIn PDF document text
    • http://culfordequestriancentre.org/UserFiles/file/81971442154.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/66726409968.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/kizegofikatonepadesotif.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/lirikarebiritero.pdfIn PDF document text
    • http://qdcmd.com/data/files/pabujujofekalenuv.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/garusiwovuroduzuvukepe.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/bozanudovovonenib.pdfIn macro / runtime command snippet
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7267b16cc---dozajutadovi.pdfIn PDF document text
    • http://www.electricIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=gta+5+mobile+game+file+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_01_sfnt_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 17384 bytes
SHA-256: 0c936f3697e9ffa798702e6858817c3e117fc3f5ad7a5ca61de81422cfe06908
font_02_sfnt_off00011aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13306 10828 bytes
SHA-256: 1dae318aac7b229d7eae3e0fef781b7c83432bf8db7ff0a56ee564677dc0b113

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